(-7^0)^99+(2又二分之一)^100*(-0.4)^101[(-2x^2y)^2]^3-[(3x^2)^3y]^2
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(-7^0)^99+(2又二分之一)^100*(-0.4)^101[(-2x^2y)^2]^3-[(3x^2)^3y]^2
(-7^0)^99+(2又二分之一)^100*(-0.4)^101
[(-2x^2y)^2]^3-[(3x^2)^3y]^2
(-7^0)^99+(2又二分之一)^100*(-0.4)^101[(-2x^2y)^2]^3-[(3x^2)^3y]^2
(1)原式=(﹣1)^99+2.5^100×(﹣0.4)^101
=﹣1+(﹣2.5×4)^100×(﹣0.4)
=﹣1﹣0.4
=﹣1.4
(2) 原式=(2X^4Y)^3-(3X^6Y)^2
=2X^12Y-3X^12Y
接下来这题算不出了、应该是你的题目有误、、或者答案就是这个
(-7^0)^99+(2又二分之一)^100*(-0.4)^101
=(-1)^99+(2.5)¹ºº×(-0.4)¹ºº×(-0.4)
=-1+(-2.5×0.4)¹ºº×(-0.4)
=-1-0.4
=-1.4
[(-2x^2y)^2]^3-[(3x^...
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(-7^0)^99+(2又二分之一)^100*(-0.4)^101
=(-1)^99+(2.5)¹ºº×(-0.4)¹ºº×(-0.4)
=-1+(-2.5×0.4)¹ºº×(-0.4)
=-1-0.4
=-1.4
[(-2x^2y)^2]^3-[(3x^2)^3y^3]^2
=(4x^4y^2)³-(27x^6y^3)²
=64x^12y^6-729x^12y^6
=-665x^12y^6
你的这个题目可能错了,我帮你改了一下
收起
(-7^0)^99+(2又二分之一)^100*(-0.4)^101
=1-(2.5)^100*0.4^100*0.4
=1-(2.5*0.4)^100*0.4
=1-0.4
=0.6
[(-2x^2y)^2]^3-[(3x^2)^3y]^2
=64x^12y^6-162x^12y^2