(lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算.
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 06:47:45
![(lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算.](/uploads/image/z/3174186-66-6.jpg?t=%28lg2%29%5E3%2B%28lg5%29%5E3%2B3lg2%2Alg5+%E8%BF%99%E4%BA%9B%E6%80%8E%E4%B9%88%E7%AE%97.)
(lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算.
(lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算.
(lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算.
令a=lg2,b=lg5
则a+b=lg2+lg5=1
原式=a³+b³+3ab
=(a+b)(a²-ab+b²)+3ab
=a²-ab+b²+3ab
=a²+2ab+b²
=(a+b)²
=1
对数乘对数,没法算,只有查表了。
lg2(lg5-lg2)-lg5(lg5+3lg2)等于
(lg2)^3+(lg5)^3+3*lg2*lg5
(lg2)³+(lg5)³+3lg2×lg5
3+lg5+(lg2)^2
3lg2-lg5=
(lg2)x(lg2)x(lg2)+(lg5)^3+3xlg2xlg5=?
(lg2)^3+(lg5)^3+3lg2*lg5等于?
(lg2)^3+(lg5)^3+3lg2*lg5怎么算RT
(lg2)^3+3lg2·lg5+(lg5)^3 怎么算?
(lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算.
(lg2)^3+3lg2·lg5+(lg5)^3 怎么算?
(lg2)^3+(lg5)^3+3lg2*lg5的值为?
(lg2)^3+3lg2乘lg5+(lg5)^3
求解3lg5+3lg2*lg5+3lg2^2~
(lg2)³+(lg5)³+3lg2×lg5(等于多少?)
(lg2)³+(lg5)³+3lg2×lg5(怎么算呀,
(lg2)³+(lg5)³+3lg2×lg5=?
(lg2)³+3lg2*lg5+(lg5)³等于多少