2^x=a,4^y=b,8x^2-4y=?

2^x=a,4^y=b,8x^2-4y=?
2025-05-01 15:34:10
推荐回答(1个)
回答1:

题目对吗?如果是正确的,则有:
2^x=a, x=log2(a)
4^y=b, y=log4 (b)
8x^2-4y=8(log2(a))^2-4log4(b)