计算log2 √(48/7)-log2 12+(1/2)log2 42-1_数学解答

计算log2 √(48/7)-log2 12+(1/2)log2 42-1

人气：427 ℃　时间：2020-03-31 16:27:44

解答

原式=log2 √(48/7)-log2 12+log2 √42-log2 2
=log2(√(48/7)÷12×√42÷2)
=log2 (√2/2)
=-1/2