ますただ
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数検準1級2次過去問【2020年12月】1番:三角関数
単元:
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指導講師:
ますただ
問題文全文(内容文):
1⃣
(1) $θ=\frac{\pi}{10}$のとき
$sin2θ=cos3θ$を示せ
(2)$sin \frac{\pi}{10}$を求めよ。
この動画を見る
1⃣
(1) $θ=\frac{\pi}{10}$のとき
$sin2θ=cos3θ$を示せ
(2)$sin \frac{\pi}{10}$を求めよ。
微分方程式⑥【2階微分方程式の一般解】(高専数学、数検1級)
単元:
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指導講師:
ますただ
問題文全文(内容文):
$\frac{d^2x}{dt^2}=-2\frac{dx}{dt}$
(1)$x=c_1e^{-2t}+c_2$ $(c_1,c_2:定数)$
は一般解であることを示せ
(2)t=0のときx=1,$\frac{dx}{dt}=2$をみたす解を求めよ
(3)t=0のときx=0
t=1のときx=1
をみたす解を求めよ。
この動画を見る
$\frac{d^2x}{dt^2}=-2\frac{dx}{dt}$
(1)$x=c_1e^{-2t}+c_2$ $(c_1,c_2:定数)$
は一般解であることを示せ
(2)t=0のときx=1,$\frac{dx}{dt}=2$をみたす解を求めよ
(3)t=0のときx=0
t=1のときx=1
をみたす解を求めよ。
数検準1級2次過去問【2020年12月】6番:ベクトル
単元:
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指導講師:
ますただ
問題文全文(内容文):
6⃣
▢ABCDが正方形の四角錐O-ABCDがある。
OAを1:1に内分する点をP
OBを2:1に内分する点をQ
OCを3:1に内分する点をR
3点P,Q,Rを通る平面とODの交点をSとする。
$\vec{ OS }$を$\vec{ OA }$,$\vec{ OB }$,$\vec{ OC }$で表せ
この動画を見る
6⃣
▢ABCDが正方形の四角錐O-ABCDがある。
OAを1:1に内分する点をP
OBを2:1に内分する点をQ
OCを3:1に内分する点をR
3点P,Q,Rを通る平面とODの交点をSとする。
$\vec{ OS }$を$\vec{ OA }$,$\vec{ OB }$,$\vec{ OC }$で表せ
奈良県教員採用試験(数学:式変形)
単元:
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指導講師:
ますただ
問題文全文(内容文):
$x+y+z=2$ , $\frac{1}{x}+\frac{1}{y}+\frac{1}{z}=\frac{1}{2}$
のとき
$\frac{1}{x^3}+\frac{1}{y^3}+\frac{1}{z^3}$の値を求めよ。
この動画を見る
$x+y+z=2$ , $\frac{1}{x}+\frac{1}{y}+\frac{1}{z}=\frac{1}{2}$
のとき
$\frac{1}{x^3}+\frac{1}{y^3}+\frac{1}{z^3}$の値を求めよ。
09愛知県教員採用試験(数学:2番 微積)
単元:
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指導講師:
ますただ
問題文全文(内容文):
2⃣ $0 \leqq x \leqq \frac{1}{\sqrt 3}$
$f(x)=\int_x^{\sqrt 3 x} \sqrt{1-t^2} dt$
(1)f(x)の最大値
(2)$\displaystyle \lim_{ x \to \infty } \frac{f(x)}{x}$
この動画を見る
2⃣ $0 \leqq x \leqq \frac{1}{\sqrt 3}$
$f(x)=\int_x^{\sqrt 3 x} \sqrt{1-t^2} dt$
(1)f(x)の最大値
(2)$\displaystyle \lim_{ x \to \infty } \frac{f(x)}{x}$
微分方程式⑤-1【1階線形微分方程式】(高専数学、数検1級)
単元:
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指導講師:
ますただ
問題文全文(内容文):
(1)$\frac{dx}{dt}=- \frac{x}{t}=t+1$
(2)$\frac{dx}{dt}+x=e^{-t}$
(3)$\frac{dx}{dt}+xcost = 2te^{-sint}$
1階線形微分方程式
$\frac{dx}{dt}+P(t)x=Q(t)$
この動画を見る
(1)$\frac{dx}{dt}=- \frac{x}{t}=t+1$
(2)$\frac{dx}{dt}+x=e^{-t}$
(3)$\frac{dx}{dt}+xcost = 2te^{-sint}$
1階線形微分方程式
$\frac{dx}{dt}+P(t)x=Q(t)$
04大阪府教員採用試験(数学:3番 複素数)
単元:
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指導講師:
ますただ
問題文全文(内容文):
3⃣ $Z_1,Z_2 \in \mathbb{C}$
$|Z_1|=|Z_2|=|Z_1+Z_2|=1$ ⇒ $Z_1^{3}=Z_2^{3}$を示せ
この動画を見る
3⃣ $Z_1,Z_2 \in \mathbb{C}$
$|Z_1|=|Z_2|=|Z_1+Z_2|=1$ ⇒ $Z_1^{3}=Z_2^{3}$を示せ
微分方程式④-1【同次形】(高専数学 数検1級)
単元:
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指導講師:
ますただ
問題文全文(内容文):
(1)$\frac{dx}{dt}=\frac{x}{t}-\frac{2t}{x}$
(2)$\frac{dx}{dt}=\frac{x}{t}+cos^2\frac{x}{t}$
(3)$\frac{dx}{dt}=\frac{x}{t}+e^{-\frac{x}{t}}$
この動画を見る
(1)$\frac{dx}{dt}=\frac{x}{t}-\frac{2t}{x}$
(2)$\frac{dx}{dt}=\frac{x}{t}+cos^2\frac{x}{t}$
(3)$\frac{dx}{dt}=\frac{x}{t}+e^{-\frac{x}{t}}$
数検1級2次過去問(6番 面積の最大値)
単元:
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指導講師:
ますただ
問題文全文(内容文):
6⃣ 円 : $x^2+y^2=1$上に図のように点Pをとる。
AP+PH
の最大値と、そのときの座標を求めよ。
この動画を見る
6⃣ 円 : $x^2+y^2=1$上に図のように点Pをとる。
AP+PH
の最大値と、そのときの座標を求めよ。
微分方程式③【一般解を求める】(高専数学、数検1級)
単元:
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指導講師:
ますただ
問題文全文(内容文):
(1)$\frac{dx}{dt}=\frac{x}{t}$
(2)$\frac{dx}{dt}=\frac{3t^2x}{t^3+1}$
(3)$\frac{dx}{dt}=\frac{x^2+1}{2xt}$
この動画を見る
(1)$\frac{dx}{dt}=\frac{x}{t}$
(2)$\frac{dx}{dt}=\frac{3t^2x}{t^3+1}$
(3)$\frac{dx}{dt}=\frac{x^2+1}{2xt}$
微分方程式②【微分方程式の解】(高専数学、数検1級)
単元:
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指導講師:
ますただ
問題文全文(内容文):
$\frac{dx}{dt}=x+e^{2t}$
(1)$x=e^{2t}$が解
(2)$x=e^{2t}+ce^t$が一般解
cは任意定数
(3)t=0,x=-1をみたす特殊解を求めよ。
この動画を見る
$\frac{dx}{dt}=x+e^{2t}$
(1)$x=e^{2t}$が解
(2)$x=e^{2t}+ce^t$が一般解
cは任意定数
(3)t=0,x=-1をみたす特殊解を求めよ。
微分方程式①【微分方程式の最初】(高専数学、数検1級解析)
単元:
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指導講師:
ますただ
問題文全文(内容文):
微分方程式
x:tの関数
$\frac{d^nx}{dt^n}+3\frac{d^3x}{dt^3}+2\frac{dx}{dt}+1=0$
(n>3)のとき
n階微分方程式
$\frac{dx}{dt}=-k(x-1):1階微分方程式\cdots*$
$x=(c-1)e^{-kt}+1$
*の解である
$左辺=\frac{dx}{dt}=-k(c-1)e^{-kt}$
$右辺=-k((c-1)e^{-kt}+1-1)$
$=-k(c-1)e^{-kt}$
∴左辺=右辺
c≠0
(1)$x=\frac{c}{t}$が解となる
微分方程式を求めよ
(2)曲線$x=ce^{2t}$が解曲線となる微分方程式を求めよ。
この動画を見る
微分方程式
x:tの関数
$\frac{d^nx}{dt^n}+3\frac{d^3x}{dt^3}+2\frac{dx}{dt}+1=0$
(n>3)のとき
n階微分方程式
$\frac{dx}{dt}=-k(x-1):1階微分方程式\cdots*$
$x=(c-1)e^{-kt}+1$
*の解である
$左辺=\frac{dx}{dt}=-k(c-1)e^{-kt}$
$右辺=-k((c-1)e^{-kt}+1-1)$
$=-k(c-1)e^{-kt}$
∴左辺=右辺
c≠0
(1)$x=\frac{c}{t}$が解となる
微分方程式を求めよ
(2)曲線$x=ce^{2t}$が解曲線となる微分方程式を求めよ。
数検準1級2次過去問(2番 数列)
単元:
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指導講師:
ますただ
問題文全文(内容文):
2⃣ a,b,cは異なる実数
a,b,c,a,b,c,a,$\cdots$
で表される等比数列は存在しないことを示せ
この動画を見る
2⃣ a,b,cは異なる実数
a,b,c,a,b,c,a,$\cdots$
で表される等比数列は存在しないことを示せ
数検準1級2次過去問(7番 微分積分)
単元:
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指導講師:
ますただ
問題文全文(内容文):
7⃣ $y=(1+logx)logx$
とx軸で囲まれた図形の面積を求めよ。
この動画を見る
7⃣ $y=(1+logx)logx$
とx軸で囲まれた図形の面積を求めよ。
練習問題3(数検準1級,教員採用試験 対数と相加相乗平均)
単元:
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指導講師:
ますただ
問題文全文(内容文):
$\sqrt x+ \sqrt y = 20$
$log_{10}x+log_{10}y$の最大値を求めよ。
この動画を見る
$\sqrt x+ \sqrt y = 20$
$log_{10}x+log_{10}y$の最大値を求めよ。
数検準1級2次過去問(1番 指数対数の不等式)
単元:
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指導講師:
ますただ
問題文全文(内容文):
1⃣
$2^xlog_2x+2^{x+2}-4log_2x-16 < 0$
をみたすxの値の範囲を求めよ。
この動画を見る
1⃣
$2^xlog_2x+2^{x+2}-4log_2x-16 < 0$
をみたすxの値の範囲を求めよ。
数検準1級1次過去問(7番 極限値)
単元:
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指導講師:
ますただ
問題文全文(内容文):
7⃣$\displaystyle \lim_{ n \to \infty } n \{ log(n+3) - logn \}$
$\displaystyle \lim_{ n \to \infty } (1+\frac{1}{n})^n = \displaystyle \lim_{ n \to 0 } (1+n)^{\frac{1}{n}}=e$
この動画を見る
7⃣$\displaystyle \lim_{ n \to \infty } n \{ log(n+3) - logn \}$
$\displaystyle \lim_{ n \to \infty } (1+\frac{1}{n})^n = \displaystyle \lim_{ n \to 0 } (1+n)^{\frac{1}{n}}=e$
数検準1級1次過去問(5番 積分)
単元:
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指導講師:
ますただ
問題文全文(内容文):
5⃣
(1)$\int x(x^2+4)^{\frac{1}{3}} dx$
(2)$\int_2^{2\sqrt{15}} x(x^2+4)^{\frac{1}{3}} dx$
この動画を見る
5⃣
(1)$\int x(x^2+4)^{\frac{1}{3}} dx$
(2)$\int_2^{2\sqrt{15}} x(x^2+4)^{\frac{1}{3}} dx$
数検準1級1次過去問(4番 複素数)
単元:
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Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
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指導講師:
ますただ
問題文全文(内容文):
4⃣
$α=-2+2i$ , $β=3+3\sqrt{3}i$
(1)$|\frac{α}{β}|$を求めよ。
(2)$\frac{α}{β}$の偏角θを求めよ。
この動画を見る
4⃣
$α=-2+2i$ , $β=3+3\sqrt{3}i$
(1)$|\frac{α}{β}|$を求めよ。
(2)$\frac{α}{β}$の偏角θを求めよ。
数検準1級1次過去問(3番 ベクトル)
単元:
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Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
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指導講師:
ますただ
問題文全文(内容文):
3⃣
$|\vec{ a }|=\sqrt{10}$ , $|\vec{ b }|=\sqrt{5}$ , $\vec{ a }・\vec{ b } = -\sqrt{2}$
$ \vec{ a }⊥(\vec{ a }+t\vec{ b })$
のとき$|\vec{ a }+t\vec{ b }|$を求めよ。
この動画を見る
3⃣
$|\vec{ a }|=\sqrt{10}$ , $|\vec{ b }|=\sqrt{5}$ , $\vec{ a }・\vec{ b } = -\sqrt{2}$
$ \vec{ a }⊥(\vec{ a }+t\vec{ b })$
のとき$|\vec{ a }+t\vec{ b }|$を求めよ。
数検準1級1次過去問(2番 解と係数の関係)
単元:
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Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
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指導講師:
ますただ
問題文全文(内容文):
2⃣$x^3-7x^2-4x+1=0$
の3つの解をα、β、γとする。
$α^2+β^2+γ^2$の値を求めよ。
解と係数の関係
$ax^3+bx^2+cx+d=0$
$α+β+γ=- \frac{b}{a}$
$αβ+βγ+γα=\frac{c}{a}$
$αβγ=- \frac{d}{a}$
この動画を見る
2⃣$x^3-7x^2-4x+1=0$
の3つの解をα、β、γとする。
$α^2+β^2+γ^2$の値を求めよ。
解と係数の関係
$ax^3+bx^2+cx+d=0$
$α+β+γ=- \frac{b}{a}$
$αβ+βγ+γα=\frac{c}{a}$
$αβγ=- \frac{d}{a}$
数検準1級1次過去問(1番 相加平均・相乗平均)
単元:
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指導講師:
ますただ
問題文全文(内容文):
1⃣ a≠0
$\frac{2a^4-4a^2+8}{a^2}$の最小値を求めよ
この動画を見る
1⃣ a≠0
$\frac{2a^4-4a^2+8}{a^2}$の最小値を求めよ
数検準1級1次過去問(6番 楕円)
単元:
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Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
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指導講師:
ますただ
問題文全文(内容文):
6⃣
楕円$x^2-4x+2y^2+12y+14=0$
の焦点の座標を求めよ。
この動画を見る
6⃣
楕円$x^2-4x+2y^2+12y+14=0$
の焦点の座標を求めよ。
08神奈川県教員採用試験(数学:10番 式変形)
単元:
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指導講師:
ますただ
問題文全文(内容文):
$\boxed{10}$ $x,y >0$
$\sqrt x + \sqrt y \leqq k \sqrt{3x+y}$
をみたすkの最小値を求めよ
この動画を見る
$\boxed{10}$ $x,y >0$
$\sqrt x + \sqrt y \leqq k \sqrt{3x+y}$
をみたすkの最小値を求めよ
06神奈川県教員採用試験(数学:1番 数列の極限)
単元:
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指導講師:
ますただ
問題文全文(内容文):
1⃣$a_1=1,\frac{(a_{n+1})^2}{a_n} = \frac{1}{e}$
$\displaystyle \lim_{ n \to \infty } a_n$を求めよ。
この動画を見る
1⃣$a_1=1,\frac{(a_{n+1})^2}{a_n} = \frac{1}{e}$
$\displaystyle \lim_{ n \to \infty } a_n$を求めよ。
練習問題2(数検1級1次レベル? 3項間漸化式)
単元:
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
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指導講師:
ますただ
問題文全文(内容文):
$a_1=-1,a_2=1$
$a_{n+2}+2a_{n+1}+4a_n=0$
一般項$a_n$を求めよ
この動画を見る
$a_1=-1,a_2=1$
$a_{n+2}+2a_{n+1}+4a_n=0$
一般項$a_n$を求めよ
重積分⑫-2【図形Dの重心】(高専数学 微積II,数検1級1次解析対応)
単元:
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Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
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指導講師:
ますただ
問題文全文(内容文):
図形Dの重心Gは
$G\begin{pmatrix}
∬_Dxdxdy & ∬_Dydxdy \\
∬_Ddxdy & ∬_Ddxdy
\end{pmatrix}$
(1)$y^2=4x,x=1$
で囲まれた図形Dの重心Gを求めよ。
(2)$\sqrt x+\sqrt y =1$,x軸、y軸で囲まれた図形Dの重心Gを求めよ。
この動画を見る
図形Dの重心Gは
$G\begin{pmatrix}
∬_Dxdxdy & ∬_Dydxdy \\
∬_Ddxdy & ∬_Ddxdy
\end{pmatrix}$
(1)$y^2=4x,x=1$
で囲まれた図形Dの重心Gを求めよ。
(2)$\sqrt x+\sqrt y =1$,x軸、y軸で囲まれた図形Dの重心Gを求めよ。
重積分⑫-1【図形Dの重心】(高専数学 微積II,数検1級1次解析対応)
単元:
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指導講師:
ますただ
問題文全文(内容文):
平面上の図形Dの重心Gは
$G\begin{pmatrix}
∬_Dxdxdy & ∬_Dydxdy \\
∬_Ddxdy & ∬_Ddxdy
\end{pmatrix}$
△OABの重心Gは
$G(\frac{0+3+3}{3},\frac{0+0+3}{3})$
$G(2,1)$
*図は動画内参照
この動画を見る
平面上の図形Dの重心Gは
$G\begin{pmatrix}
∬_Dxdxdy & ∬_Dydxdy \\
∬_Ddxdy & ∬_Ddxdy
\end{pmatrix}$
△OABの重心Gは
$G(\frac{0+3+3}{3},\frac{0+0+3}{3})$
$G(2,1)$
*図は動画内参照
練習問題1(数検準1級、教員採用試験 数列の極限)
単元:
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
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指導講師:
ますただ
問題文全文(内容文):
$a_2=a_1=1$
$a_{n+2}=a_{n+1}+a_n$
$\displaystyle \lim_{ n \to \infty } \frac{loga_n}{n}$を求めよ。
この動画を見る
$a_2=a_1=1$
$a_{n+2}=a_{n+1}+a_n$
$\displaystyle \lim_{ n \to \infty } \frac{loga_n}{n}$を求めよ。
重積分⑪【f(x,y)の領域Dにおける平均】(高専数学 微積II,数検1級1次解析対応)
単元:
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Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 269
Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/taxonomy-teacher.php on line 270
指導講師:
ますただ
問題文全文(内容文):
$Z=f(x,y)$のDにおける平均
${}^{\exists}h \in \mathbb{R}$
$h×D=∬_D f(x,y)dxdy$
この動画を見る
$Z=f(x,y)$のDにおける平均
${}^{\exists}h \in \mathbb{R}$
$h×D=∬_D f(x,y)dxdy$