(log2^3 +log3^5) x ( log3^5 +log9^5 ) x lg 2 ,
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(log2^3 +log3^5) x ( log3^5 +log9^5 ) x lg 2 ,
本人对数特别差,最好带解说,
(log2^3 +log5^3) x ( log3^5 +log9^5 ) x lg 2
本人对数特别差,最好带解说,
(log2^3 +log5^3) x ( log3^5 +log9^5 ) x lg 2
对数连底都没有!
再问: 有,比如第一个对数,就是以2为底,3的对数,只是不知道怎么打,所以这样写了,求解!!刚刚题目写错了,我修改了,求高手解决啊!!!帮帮忙啦
再答: (log2^3 +log5^3) x ( log3^5 +log9^5 ) x lg 2
=(log2^3 +log5^3) x ( log3^5 +1/2log3^5 ) x lg 2
=3/2(log2^3 +log5^3) x log3^5 x lg 2
=3/2log2^3x log3^5 x lg 2 +3/2log5^3 x log3^5 x lg 2
=3/2log2^5x lg 2 + 3/2lg 2
=3/2lg 5 + 3/2lg 2
=3/2 (lg5 +lg 2)
=3/2
再问: 有,比如第一个对数,就是以2为底,3的对数,只是不知道怎么打,所以这样写了,求解!!刚刚题目写错了,我修改了,求高手解决啊!!!帮帮忙啦
再答: (log2^3 +log5^3) x ( log3^5 +log9^5 ) x lg 2
=(log2^3 +log5^3) x ( log3^5 +1/2log3^5 ) x lg 2
=3/2(log2^3 +log5^3) x log3^5 x lg 2
=3/2log2^3x log3^5 x lg 2 +3/2log5^3 x log3^5 x lg 2
=3/2log2^5x lg 2 + 3/2lg 2
=3/2lg 5 + 3/2lg 2
=3/2 (lg5 +lg 2)
=3/2
(log2^3 +log3^5) x ( log3^5 +log9^5 ) x lg 2 ,
log2(3)+log3(5)+log3(2)=?
(log2(3)+log8(9))x(log3(4)+log9(8)+log3(2))
1.log2 3*log3 4*log4 5*log5 2 2.(log4 3+log8 3)8(log3 2+log9
由换底公式怎么得到log9(x+5)=log3[2(x+5)]=1/2log3(x+5)
log3 5-log3 15+1/2log9 27 的值
(log3 4+log3 8)(log2 3+log2 9)+(log3 根号2)(log9 7)/(log1/3 7)
计算(log4 3+ log8 3)(log3 2+ log9 2)-- log1/2 32^(1/3)+5^(log2
解不等式:log3^(5+x)+log3^(x-1)≤3
log 243÷log9 =log3^5÷log3^2 =log3^5-log3^2 然后怎么写
若log2^3×log3^4×log4^x=log9^3 ,求x
计算:lg(1/2)-lg(5/8)+lg(12.5)+log2为底3*log3为底8=