这道题怎么解,求详细步骤
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limx->0+ x^2sinx
=limx->0+ e^lnx^2sinx
=limx->0+ e^ 2sinx * lnx
=limx->0+ e^2 * lnx / 1/sinx (∞/∞型)
=limx->0+ e^2 * 1/x / -cosx/sin^2 x
=limx->0+ e^2 * - sin^2 x /xcosx
=limx->0+ e^2 * - x^2/xcosx
=e^0
=1
=limx->0+ e^lnx^2sinx
=limx->0+ e^ 2sinx * lnx
=limx->0+ e^2 * lnx / 1/sinx (∞/∞型)
=limx->0+ e^2 * 1/x / -cosx/sin^2 x
=limx->0+ e^2 * - sin^2 x /xcosx
=limx->0+ e^2 * - x^2/xcosx
=e^0
=1
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