Log2√(7/48) +log2 12 -(1/2)log2 42
问题描述:
Log2√(7/48) +log2 12 -(1/2)log2 42
要详细点的额
答
log2√(7/48)+log2 12 -1/2log2 42
=log2√(7/48)+log2(12)-log2√42
=log2√(7/48)*12/√42
=log2√7*144/48*42
=log2√(1/2)
=1/2log2(1/2)
=-1/2