问题标题:
lim┬(x→0)〖(∫_0^x〖e(t次方)sint(平方)dt〗)/x(立方);〗
问题描述:
lim┬(x→0)〖(∫_0^x〖e(t次方)sint(平方)dt〗)/x(立方);〗
李书明回答:
lim(x→0)[∫(0到x)(e^t)sin(t^2)dt]/x^3
=lim(x→0)(e^x)sin(x^2)/(3x^2),洛必达法则
=(1/3)lim(x→0)sin(x^2)/(x^2)*lim(x→0)e^x
=(1/3)*1*1
=1/3
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