(log3^4+log5^2)(log2^9+log2^根号3)

芙蓉仙子2022-10-04 11:39:542条回答

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lx521604 共回答了23个问题 | 采纳率69.6%
(log3^4+log5^2)(log2^9+log2^根号3)
=(lg4/lg3+lg2/lg5)(lg9/lg2+lg根号3/lg2)
=(2lg2*lg5+lg2*lg3)/lg3*lg5*(lg9+lg根号3)/lg2
=3/2(2lg5+lg3)/lg5
=3/2lg(25/3)/lg5
=3/2log5^(25/3)
1年前
俺的hh哎 共回答了7个问题 | 采纳率
(log3^4+log5^2)(log2^9+log2^根号3)
=(2log3^2+log5^2)(2log2^3+0.5log2^3)
=(2log3^2+log5^2)*2.5log2^3
=5+2.5log5^3
1年前

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原式
= lg25/lg4-2lg10/lg4+lg9/lg2×lg√5/lg3×lg2/lg5
= (2lg5)/(2lg2)-2/(2lg2)+(2lg3)/lg2×(½lg5)/lg3×lg2/lg5
= lg5/lg2-1/lg2+1
= (lg5-1+lg2)/lg2
= (lg5+lg2-1)/lg2
= (lg10-1)/lg2
= (1-1)/lg2
= 0