2^(log4^12)-3^(log9^27)+5^(log25^1/3)等于多少?
log4(底数)8(真数)—log9分之1(底数)3(真数)等于多少
log5^6×log6^7×log7^8×log8^9×log9^10等于多少?
log4^27×log(8)25×log9^5
log9^8×log4^27=____.
[log2(3)+log4(9)][log3(4)+log9(2)]等于
log9(45)-log9(5)
log3 5-log3 15+1/2log9 27 的值
log2 根号2+log9 27+4^log4 13=?
log2^根号下2+log9^27+4^(log4^13)
计算:(1/4)^log4^1/3-lg25-lg4-log9^27
若lg2=a,lg3=b,则log9 20 等于