Mathematics
Senior High
Resolved
なんでここ（赤）にtが出てくるか分かりません。どこから出てきたのでしょうか？教えてください🙇♀️テストが近いので回答早めに教えて下さると助かります💦
(2) f(x) = x² + (2x+1)f (t)dt
2x St.
= x²+2x | f(t)dt+
L
tf (t)dt
So's (t)dt, fff (t) dt は定数であるか
ら,それぞれ
a = f(t)dt
-= tf (t)dt (... 2
とおくと
f(x) = x²+2ax+b
1, 2, 3 h
= L" F (t) dt
a =
=
(t²+2at+b)dt
+at² + bt
3
3
521 次の等式を満たす関数 f(x) を求めよ。
(1) f(x) = 3x² + (2x+1)f (t)dt ☑*
(2)* f(x) = x² + (2x+t)f (t)dt
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すごくわかりやすかったです！ありがとうございます！