2^x=3 4^y=5则2^(x-2y))的值为?
问题描述:
2^x=3 4^y=5则2^(x-2y))的值为?
答
2^(x-2y)
=2^x÷2^2y
=2^x÷4^y
=3/5
2^x=3 4^y=5则2^(x-2y))的值为?
2^(x-2y)
=2^x÷2^2y
=2^x÷4^y
=3/5