七年级下册的数学题,要写过程及答案,高手请进!回答好的有追加!最好拿一张纸,右上角的难打,体谅!
1.(-a^2)^5=(-a^2)^2 x(-a^2)^2x(-a^2)=a^4xa^4x(-a^2)=-a^10
2.(-t) x (-t^2)^6 x t = -t^14
3.(a-b) x {(b-a)^3}^5 = {-(b-a)} x (b-a)^15 = -(b-a)^16
4不懂题兄虚意
5. x^5(x^4+1)
6.(x^3) x (y^2) x (-xy^3)^2 = x^3y^2x^2y^6 = x^5y^8
7.(-2a^4)^2+a^12 = 4a^8 + a^12 =a^8(4+a^4)
8.(1/7)^18 x (-7)^19 = 7^-18 x (-7^18) = -1/7
9.[(9m)^4 (n^2)^3 ]+[(-3m)^2 (n)^3]^2 这是你说没的题吗? 过程如下:数猜
(9^4)(m^4)(薯尘型n^6)+ [9(m^2)(n^3)] ^2 = (9^4)(m^4)(n^6)+ (9^2)(m^4)(n^6) = ( m^4)(n^6) x (9^2 + 9^4)
10.(3 a^2)^3( b^4) - 3(ab^2)^2( a^4) = 9(a^6)(b^4) - 3(a^2)(b^4)(a^4) = 6(a^6)(b^4)
11.(3x10^4)3 = 3^3x10^12 = 27x10^12 = 2.7X10^13
12. 2^(x+3) . 3^(x+3) = 36^(x-2) (2^x)(2^3)(3^x)(3^3)=(36^x)/(36^2) (2^x))(3^x)(27 . 8 .36^2) = 36^x 6^x = (27)(8)(36^2) x=7
1186258652 1.(-a^2)^5=(-a^2)^2 x(-a^2)^2x(-a^2)=a^4xa^4x(-a^2)=-a^10
2.(-t) x (-t^2)^6 x t = -t^14
3.(a-b) x {(b-a)^3}^5 = {-(b-a)} x (b-a)^15 = -(b-a)^16
我也上初一1、因为5是奇数所以最脊裤终结果是负的2、因为樱迹简负t的2次方的6次方,州旦6是偶数所以是正的。他们的次数分别就是1、12、1加起来就是14喽1978335769
第4题=8