f(x)=x^2,and if h is not zero,then f(x+h)-f(x)/h=?美国的数学题,

zjf8000 1年前已收到3个回答举报

dwayne009 幼苗

共回答了16个问题采纳率：93.8% 举报

h不等于0
则[f(x+h)-f(x)]/h
=[(x+h)^2-x^2]/h
=(x+h+x)(x+h-x)/h
=h(2x+h)/h
=2x+h

1年前

Lionel_Andres_Me 幼苗

共回答了25个问题举报

[f(x+h)-f(x)]/h=2x+h

1年前

april29yang 幼苗

共回答了275个问题举报

f(x)=x^2,如果h≠0，那么[f(x+h)-f(x)]/h=?
[f(x+h)-f(x)]/h
=[(x+h)^2-x^2]/h
=(x^2+2xh+h^2-x^2)/h
=(2xh+h^2)/h
=2x+h

1年前

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