"2∧a>2∧b”是log∨2a>log∨ 2b”什么条件?

"2∧a>2∧b”是log∨2a>log∨ 2b”什么条件?
"2∧a>2∧b”是log∨2a>log∨ 2b”什么条件?

"2∧a>2∧b”是log∨2a>log∨ 2b”什么条件?
必要非充分条件.
2∧a>2∧b 等价于 a>b
log2∨a>log2∨b 等价于 a>b>0