Question

（x^-4y⁵）^-2•（-2x^-3y^-2）³•（4x^-1y^-20）^-1

Answer 1

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