lim h趋向0 [(x+h)^3—x^3]/h
=lim h趋向0 [3x^2 *h +3x*h^2 +h^3]/h
=lim h趋向0 (3x^2 +3xh +h^2)
=3x^2
lim h趋向0 (x+h)^3—x^3/h (即分母是h,分子是(x+h)^3) 求极限 请写下过程,
2个回答
相关问题
-
lim {(x+h)^3-x^3}/h h→0 极限
-
lim[√（h＋x）－√x]/h h趋向于0
-
lim h趋向0 (x+h)^2-x^2/h
-
求lim 的极限1.lim h →0 {[1/(5+h)]-1/5}/h2.lim x→1 (x^3-x^2+2x-2)
-
f（x)=x^2 求lim{f(x+h)-f(x)}/h h趋向于0
-
lim(h趋向于0）［sin(x+h)-sinx］／h
-
1.2求极限lim(x→0) [(x+h)^2-x^2]/ h
-
数学极限问题?lim(h->0)=h-sin(h)/h^2极限怎么求?,写出具体过程!
-
f(x)在x处二阶可导,求lim{[f(x+h)-2f(x)+f(x-h)]/h^2},h趋向于0
-
f'(x)=-2,求limf(x+h)-f(x-h)/h(h趋向于0)