求lim(x->0)( x^2-∫(0-x^2)cos(t^2))/(sinx)^10,积分是0到x^2,写成∫(0-x^2)这样了,

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求lim(x->0)( x^2-∫(0-x^2)cos(t^2))/(sinx)^10,积分是0到x^2,写成∫(0-x^2)这样了,
求lim(x->0)( x^2-∫(0-x^2)cos(t^2))/(sinx)^10,
积分是0到x^2,写成∫(0-x^2)这样了,

求lim(x->0)( x^2-∫(0-x^2)cos(t^2))/(sinx)^10,积分是0到x^2,写成∫(0-x^2)这样了,

若不断用洛必达法则也挺麻烦的.考虑一下等价无穷小吧.