已知a²=4^b=2^10 求(1/4a+1/5b)(1/4a-1/5b)-(1/4a+1/5b)²的值 急
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![已知a²=4^b=2^10 求(1/4a+1/5b)(1/4a-1/5b)-(1/4a+1/5b)²的值 急](/uploads/image/z/5410449-9-9.jpg?t=%E5%B7%B2%E7%9F%A5a%26%23178%3B%3D4%5Eb%3D2%5E10+%E6%B1%82%281%2F4a%2B1%2F5b%29%281%2F4a-1%2F5b%29-%281%2F4a%2B1%2F5b%29%26%23178%3B%E7%9A%84%E5%80%BC+%E6%80%A5)
已知a²=4^b=2^10 求(1/4a+1/5b)(1/4a-1/5b)-(1/4a+1/5b)²的值 急
已知a²=4^b=2^10 求(1/4a+1/5b)(1/4a-1/5b)-(1/4a+1/5b)²的值 急
已知a²=4^b=2^10 求(1/4a+1/5b)(1/4a-1/5b)-(1/4a+1/5b)²的值 急
二的十次方等于二的五乘二次方,所以A等于二的五次方,B等于五.后面的式子用提取公因式,得到(1/4a+1/5b)(1/4a-1/5b-1/4a-1/5b)=(1/4a+1/5b)(-2/5b)再代入AB得-2^4=-16