Mathematics
Senior High
376(2)の式変形が分かりません
教えて頂きたいです
376 次の関数の,与えられたxの値における微分係数を求めよ。
数p18
.0*(2) f(x)=-x°+3x (x=a)
(1) f(x)=2x° (x=D2)
377 関数 y=-2x° のグラフ上の次の点における接線の傾きを求め上の願n
=8
(2) f'(a)= lim
f(a+h)-f(a)
h
h→0
=lim
h→0
{-(a+h)+3(a+h)} (-α°+3a)
0h
-2ah-h?+3h
- lim
h(-2a-h+3)
- lim
ニ
三
h→0
h
h→0
=lim(-2a-h+3)=-2a+3
h→0
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2行目の計算内容
-a^2-2ah-h^2+3a+3h+a^2-3a=-2ah-h^2+3h