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](/uploads/image/z/5177966-14-6.jpg?t=%E6%B1%82%E5%80%BC%3A%28lg2%29%5E3%2B3%28lg2%29%5E2%2Alg5%2B3lg2%2A%28lg5%29%5E2%2B%28lg5%29%5E3)
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