求值：3^(log3 (25) )+(-C(5,4)^(log2 1)+16^(log4(2sin(π/2))=

求值：(log4(3)+log8(3))(log3(2)+log3(4))-log2(64) 利用换底公式求值：1.log2 25 ×log3 4 ×log5 9 2.（log4 3+log8 3）（log3 2+ log3^36-log3^4+log2(log2^16)+8^2/3+(27/8)^-1/3+log8^27/log4^ log2(3)*log3(4)*log4(5)*.log(k+1)(k+2)=log2(k+2) 怎么证 log2(20)-log2(5)+2log3(2)×log4(3) log的计算 ：log2（20）-log4（25)= log3(2)×log2（5）×log5（3）=?log2[log 1.log2 3*log3 4*log4 5*log5 2 2.(log4 3+log8 3)8(log3 2+log9 (log2 5+log4 125)log3 2/ log根号3 5 [log2(3)+log4(9)][log3(4)+log9(2)]等于 若a=log2 3,b=log3 2,c=log4 6比较大小 求值:(log4^ 3+log8 ^9)*(log3^ 2+log9 ^16) log4^25-2log4^10+log2^9×log3^根号5×log5^2