先化简,再求值:a³·(-b³)²+(-1/2ab²)³,其中a=1/4,b=4.
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![先化简,再求值:a³·(-b³)²+(-1/2ab²)³,其中a=1/4,b=4.](/uploads/image/z/1672861-13-1.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9Aa%26%23179%3B%C2%B7%EF%BC%88-b%26%23179%3B%EF%BC%89%26%23178%3B%2B%EF%BC%88-1%2F2ab%26%23178%3B%EF%BC%89%26%23179%3B%2C%E5%85%B6%E4%B8%ADa%3D1%2F4%2Cb%3D4.)
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先化简,再求值:a³·(-b³)²+(-1/2ab²)³,其中a=1/4,b=4.
先化简,再求值:a³·(-b³)²+(-1/2ab²)³,其中a=1/4,b=4.
先化简,再求值:a³·(-b³)²+(-1/2ab²)³,其中a=1/4,b=4.
a³·(-b³)²+[(-1/2)ab²]³
=a³·b^6-(1/8)a³b^6
=(7/8)a³b^6
=(7/8)*(1/64)*(64)
=7/8