问几道初中代数题,初中数学优秀者请进,(写出详细过程最好)1.计算下列各式 (1)(a^2b^-2)^2 × (b^2c)^2 / 2a^-2c^-2 (2)[3(x-y)^2(x+y)^-2 / 4(x+y)^2(x-y)^-2]^-22.约分 (1)xy + xy^2 /x^2y^3+x^2y^4 (2) 1+m / 2+m-m^23.先约
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![问几道初中代数题,初中数学优秀者请进,(写出详细过程最好)1.计算下列各式 (1)(a^2b^-2)^2 × (b^2c)^2 / 2a^-2c^-2 (2)[3(x-y)^2(x+y)^-2 / 4(x+y)^2(x-y)^-2]^-22.约分 (1)xy + xy^2 /x^2y^3+x^2y^4 (2) 1+m / 2+m-m^23.先约](/uploads/image/z/3999727-55-7.jpg?t=%E9%97%AE%E5%87%A0%E9%81%93%E5%88%9D%E4%B8%AD%E4%BB%A3%E6%95%B0%E9%A2%98%2C%E5%88%9D%E4%B8%AD%E6%95%B0%E5%AD%A6%E4%BC%98%E7%A7%80%E8%80%85%E8%AF%B7%E8%BF%9B%2C%EF%BC%88%E5%86%99%E5%87%BA%E8%AF%A6%E7%BB%86%E8%BF%87%E7%A8%8B%E6%9C%80%E5%A5%BD%EF%BC%891.%E8%AE%A1%E7%AE%97%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F+%281%29%28a%5E2b%5E-2%29%5E2+%C3%97+%28b%5E2c%29%5E2+%2F+2a%5E-2c%5E-2+%282%29%5B3%28x-y%29%5E2%28x%2By%29%5E-2+%2F+4%28x%2By%29%5E2%28x-y%29%5E-2%5D%5E-22.%E7%BA%A6%E5%88%86+%281%29xy+%2B+xy%5E2+%2Fx%5E2y%5E3%2Bx%5E2y%5E4+%282%29+1%2Bm+%2F+2%2Bm-m%5E23.%E5%85%88%E7%BA%A6)
问几道初中代数题,初中数学优秀者请进,(写出详细过程最好)1.计算下列各式 (1)(a^2b^-2)^2 × (b^2c)^2 / 2a^-2c^-2 (2)[3(x-y)^2(x+y)^-2 / 4(x+y)^2(x-y)^-2]^-22.约分 (1)xy + xy^2 /x^2y^3+x^2y^4 (2) 1+m / 2+m-m^23.先约
问几道初中代数题,初中数学优秀者请进,(写出详细过程最好)
1.计算下列各式
(1)(a^2b^-2)^2 × (b^2c)^2 / 2a^-2c^-2
(2)[3(x-y)^2(x+y)^-2 / 4(x+y)^2(x-y)^-2]^-2
2.约分
(1)xy + xy^2 /x^2y^3+x^2y^4
(2) 1+m / 2+m-m^2
3.先约分,再求值
(1) 3a^2-ab / 9a^2-6ab+b^2 ,其中a=3/4 , b=- 2/3
4.计算
(1)(x^2-y^2 / x+y) ÷ (x^2+xy /2x+2y)
(2)(x^2-y^2) ÷ xy-y^2/x+y
5.计算下列各式,并且使结果中只含有正整数指数
(1) [(x+y)^2(x-y)^-2]^2
问几道初中代数题,初中数学优秀者请进,(写出详细过程最好)1.计算下列各式 (1)(a^2b^-2)^2 × (b^2c)^2 / 2a^-2c^-2 (2)[3(x-y)^2(x+y)^-2 / 4(x+y)^2(x-y)^-2]^-22.约分 (1)xy + xy^2 /x^2y^3+x^2y^4 (2) 1+m / 2+m-m^23.先约
1(1)原式=a^4b^-4×b^4c^2/2a^-2c^-2=a^4/b^4×b^4c^4a^2c^2/2=c^6a^6
(2)原式=[3(x-y)^2(x-y)^2 / 4(x+y)^2(x+y)^2]^-2=[4(x+y)^4/3(x-y)^4]^2
=16(x+y)^8/9(x-y)^8
2(1)原式=xy+1/xy+x^2y^4=1+x^2y^2+x^3y^5
(2)原式=2+m+2m-2m^2
先答这么多吧.
晕,你题目里有些符号是不是打错了啊
您的分也太低了。我数学不行。 - -