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Mathematics Senior High

マーカーのところで、原始関数ってなんですか?

400 基本 例題 239 定積分で表された関数の微分 次の関数を微分せよ。 について (1) f(x)=f(t-x) sintdt ことを証明 (2) f(x)=xlogydt(xン 1 (大) 指針▷(1) p.399 基本事項 ②① off(t)dt=f(x) (αは定数) (ここで, 積分変数は tであるから, 積分の計算で x は定数として扱う。 Sot-x)sintdt=S,tsintdt-x, sintdt と変形するとわかりやすくなる。 193 整式(x)は3次以下で、次の 解答 - 積分変数と関係のない文字 x を定積分の前に出す。 (2)p.399 基本事項 ② ② を利用してもよいが,下の解答では, じように,f(t) の原始関数をF(t) として考えてみよう。 (1) f(x)=f(t-x)sintdt=Sotsintdt-xSo sintdt示。 120 よって (x-10g2px を求め 公式を導いたときと同 xは定数とみて、定積分の 前に出す。 f(x)=aSotsintdt-{(x)'S, sintdt+x(axS, sintat)} x5 195 1x =xsinx-(Sosintdt+xsinx) = [cost] = J0 =cosx−1 (1,1)の値 int dt の微分は,積 の導関数の公式を利用。 (uv)'=u'v+uv' (1 表せ。ただかは自然とする。 1 (2) の原始関数をF (t) とすると logt ()()=6(1 1 logt Stadt dt=F(x3)-F(x2), F'(t)=- 定積分の定義。 logt 0196 よってf(x)= x1 1 dt=F'(x3)(x3)'F'(x2)(x2) 合成関数の導関数。 dx 2 logt すな 32 2x x x²-x ことを10gx3 10gx210gx 10gx log d 別解 Smif(t)dt=f(g(x))g'(x)-f(h(x))h(x) を用いSoftは既知の関数で表 dxh(x) logt 八 1 すことはできないことが知 るとf'(x)= • (x³)'. 10gx3 10gx2 (x)=xられている。 3x² 2x HIND x²-x b 23logx 210gx 2logx logx の (x)`A((x)\)³R—(x) \((x))\\\=

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English Senior High

わかりません!! 答え教えてください!🥺

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