求值(log43+log83)(log32+log92) 注:log后面那为数是底数,最好用通俗易懂的解法.

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求值(log43+log83)(log32+log92) 注:log后面那为数是底数,最好用通俗易懂的解法.
求值(log43+log83)(log32+log92) 注:log后面那为数是底数,最好用通俗易懂的解法.

求值(log43+log83)(log32+log92) 注:log后面那为数是底数,最好用通俗易懂的解法.
换底公式轻松解决:
原式=
(log3/log4+log3/log8)(log2/log3+log2/log9) (log是10为底)
=(log3/(2log2)+log3/(3log2))(log2/log3+log2/(2log3))
=5/6*log3/log2*3/2*log2/log3
=5/4

换底公式轻松解决:
原式=
(log3/log4+log3/log8)(log2/log3+log2/log9) (log是10为底)
=(log3/(2log2)+log3/(3log2))(log2/log3+log2/(2log3))
=5/6*log3/log2*3/2*log2/log3
=5/4

计算器算的 1.25

(log32+log92)(log43+log83)求值 求值(log43+log83)(log32+log92) 求值(log43+log83)(log32+log92) 注:log后面那为数是底数=5/6*log3/log2*3/2*log2/log3=5/4 怎么来的 求值(log43+log83)(log32+log92) 注:log后面那为数是底数,最好用通俗易懂的解法. 求值(log43+log83)(log32+log92) 注:log后面那为数是底数,最好用通俗易懂的解法.还有一题:lg14-2lg7/3+lg7-lg18 (log23+log92)(log43+log83)第一个数字是下标, (log43+log83)(log32+log92)-log1/2乘以32的根号的4次方(log4*3+log8*3)(log3*2+log9*2)-log1/2乘以32的根号的4次方 (log43+log83)(log32+log92)知道用换底公式,而且结果为5/4 运用换底公式化简下列各式logaC×logcAlog23×log34×log45×log52(log43+log83)(log32+log92) 第一个数字都是下标(log43+log83)(log35-log95)*(log52+log252)= 运用对数的换底公式化简log23×log34×log45×log52:;(log43+log83)(log32+log92).请写出过程. (log3^14-log3^2)log7^9求值 求值 9^log3 2的值 1.设正方体的棱长为2倍根号3/3,则它的外接球的表面积是__________2.lg5*lg8000+(lg2^根号3)^2+lg1/6+lg0.063.(lg2)^3+(lg5)^3+[log2(2在下面)5/log2(2在下面)10 ]*1/log8(8在下面)104.(log43+log83)*(log35+log95)*(log52+log252) 预习高一知识,换底公式死活不会用.我很笨的,最好有简单的例题.像logac*logca,log23*log34*log45*log52,(log43+log83)(log32+log92)我一点也不会做啊~55555..能使我弄明白的话我再加分.谢啦. (log3 2+log9 2)*(log4 3+log8 3)求值 1/log5^7+1/log3^7+1/log2^7 ,求值 27^((2/3)+log3^2) 求值. 在线=