①loga2+loga1/2(a>0,且a≠1) ②log3(18)-log3(2) ③1g1/4-1g25

问题描述:

①loga2+loga1/2(a>0,且a≠1) ②log3(18)-log3(2) ③1g1/4-1g25
④ 2log5(10)+log5(0.25)
⑤2log5(25)-3log2(64)
⑥log2(log2(16)

((1)0;(2)2;(3)-2(4)2;(5)-20;(6)2