作业帮求值:(lg2)^3+3(lg2)^2*lg5+3lg2*(lg5)^2+(lg5)^3
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求值:(lg2)^3+3(lg2)^2*lg5+3lg2*(lg5)^2+(lg5)^3
求值:(lg2)^3+3(lg2)^2*lg5+3lg2*(lg5)^2+(lg5)^3
求值:(lg2)^3+3(lg2)^2*lg5+3lg2*(lg5)^2+(lg5)^3
和立方公式
(lg2)^3+3(lg2)^2*lg5+3lg2*(lg5)^2+(lg5)^3
=[lg2+lg5]^3
=(lg10)^3
=1