已知n为正整数,且(x的n次方)²=8,求(二分之一x的3n次方)²-3(x²)的2n次方求解啊·····明天要交作业的
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![已知n为正整数,且(x的n次方)²=8,求(二分之一x的3n次方)²-3(x²)的2n次方求解啊·····明天要交作业的](/uploads/image/z/1625533-61-3.jpg?t=%E5%B7%B2%E7%9F%A5n%E4%B8%BA%E6%AD%A3%E6%95%B4%E6%95%B0%2C%E4%B8%94%28x%E7%9A%84n%E6%AC%A1%E6%96%B9%29%26%23178%3B%3D8%2C%E6%B1%82%28%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80x%E7%9A%843n%E6%AC%A1%E6%96%B9%29%26%23178%3B-3%28x%26%23178%3B%29%E7%9A%842n%E6%AC%A1%E6%96%B9%E6%B1%82%E8%A7%A3%E5%95%8A%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%E6%98%8E%E5%A4%A9%E8%A6%81%E4%BA%A4%E4%BD%9C%E4%B8%9A%E7%9A%84)
已知n为正整数,且(x的n次方)²=8,求(二分之一x的3n次方)²-3(x²)的2n次方求解啊·····明天要交作业的
已知n为正整数,且(x的n次方)²=8,求(二分之一x的3n次方)²-3(x²)的2n次方
求解啊·····明天要交作业的
已知n为正整数,且(x的n次方)²=8,求(二分之一x的3n次方)²-3(x²)的2n次方求解啊·····明天要交作业的
即x的2n次方=8
所以原式=1/4*x的6n次方-3x的4n次方
=1/4*(x的2n次方)³-3*(x的2n次方)²
=1/4*512-3*64
=-64