数学题填空
3个回答
展开全部
(8)
(3^4)^3=3^12
(12)个(3)相乘
(9)
(1)
x^13.x^7 = x^20 = (x^4)^5= (x^5)^4 = (x^2)^10
(2)
a^(2m) = (a^m)^2 = (a^2)^m
(10)
a^3=5
(a^2)^3 = (a^3)^2 = 5^2 =25
(11)
5^2 . 25^x = 625
5^(2+2x) =5^4
2+2x=4
x=1
(12)
a^3.a^4.a +(a^2)^4 -(a^4)^2
=a^8+a^8-a^8
=a^8
(3^4)^3=3^12
(12)个(3)相乘
(9)
(1)
x^13.x^7 = x^20 = (x^4)^5= (x^5)^4 = (x^2)^10
(2)
a^(2m) = (a^m)^2 = (a^2)^m
(10)
a^3=5
(a^2)^3 = (a^3)^2 = 5^2 =25
(11)
5^2 . 25^x = 625
5^(2+2x) =5^4
2+2x=4
x=1
(12)
a^3.a^4.a +(a^2)^4 -(a^4)^2
=a^8+a^8-a^8
=a^8
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