Question

計(jì)算（x^-4y⁵）^-2•（-2x^-3y^-2）³•（4x^-1y^-20）^-1．

Answer 1

【答案】分析：利用指數(shù)冪的運(yùn)算性質(zhì)即可得出．
解答：解：原式=-2×4x⁸y^-10•x^-9y^-6x¹y²⁰=-8x^8-9+1y^-10-6+20=-8y⁴．
點(diǎn)評(píng)：熟練掌握指數(shù)冪的運(yùn)算性質(zhì)是解題的關(guān)鍵．