Question

数学快点！！！

(1)-x^-2 (2)2x^2y^-3 (3)5xy(x+y)^-2 (4)4^-3a^-1b^2 (5)-xy分之2 (6)x+2y分之2x (7)2a^2b^3分之a+b (8)x^2y^2(x^2+y^2) (9)(-a^2)^3乘以(-a^3)^-2 (10)(2ab^2)^2乘以(3ab)^-3
整数指数幂及其运算快！！！

Answer 1

看不懂题目，不知道要求做什么，请补充完整。是做整式、分式划分，还是做因式分解？？

(1)-x^-2 =-1/x^2
(2)2x^2y^-3=2x^2/y^3
(3)5xy(x+y)^-2=5xy / (x+y)^2
(4)4^-3a^-1b^2=b^2/(64a)
(5)-xy分之2 =-2/xy
(6)x+2y分之2x =2x/(x+2y)
(7)2a^2b^3分之a+b
=(a+b)/2a^2b^3
(8)x^2y^2(x^2+y^2)
=x^4y^2+x^2y^4
(9)(-a^2)^3乘以(-a^3)^-2
=(-a^6)乘以(1/a^6)
=-1
(10)(2ab^2)^2乘以(3ab)^-3
=(4a^2b^4)乘以(1/27a^3b^3)
=(4b)/(27a)

Answer 2

(1﹚1／x² (2)﹙2x²／y³﹚(3)5xy／﹙x﹢y﹚² (4)﹙1／256ab²﹚(5)﹣﹙2／xy﹚(6) 2x／(x+2y)
(7)(a+b)／2a²b³ (8)x^4y²+x²y^4 (9)﹣1 (10)(4b)／(27a)

Answer 3

太难！

Answer 4

=0，或者>0,<0