1、6(a-b)^5 /[1/3(a-b)^2]=_____.2、计算:2000*2^2000/(1999*2^1999-1998*2^1998) 3、a^2-b^2=ab(ab不等于0),求(a^2)/(b^2)+(b^2)/(a^2)的值.(温馨提示:(a^2-b^2)/ab=(a/b) -(b/a)
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![1、6(a-b)^5 /[1/3(a-b)^2]=_____.2、计算:2000*2^2000/(1999*2^1999-1998*2^1998) 3、a^2-b^2=ab(ab不等于0),求(a^2)/(b^2)+(b^2)/(a^2)的值.(温馨提示:(a^2-b^2)/ab=(a/b) -(b/a)](/uploads/image/z/2560097-65-7.jpg?t=1%E3%80%816%EF%BC%88a-b%EF%BC%89%5E5+%2F%5B1%2F3%28a-b%29%5E2%5D%3D_____.2%E3%80%81%E8%AE%A1%E7%AE%97%EF%BC%9A2000%2A2%5E2000%2F%281999%2A2%5E1999-1998%2A2%5E1998%29+3%E3%80%81a%5E2-b%5E2%3Dab%28ab%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%2C%E6%B1%82%28a%5E2%29%2F%28b%5E2%29%2B%28b%5E2%29%2F%28a%5E2%29%E7%9A%84%E5%80%BC.%28%E6%B8%A9%E9%A6%A8%E6%8F%90%E7%A4%BA%EF%BC%9A%28a%5E2-b%5E2%29%2Fab%3D%28a%2Fb%29+-%28b%2Fa%29)
1、6(a-b)^5 /[1/3(a-b)^2]=_____.2、计算:2000*2^2000/(1999*2^1999-1998*2^1998) 3、a^2-b^2=ab(ab不等于0),求(a^2)/(b^2)+(b^2)/(a^2)的值.(温馨提示:(a^2-b^2)/ab=(a/b) -(b/a)
1、6(a-b)^5 /[1/3(a-b)^2]=_____.
2、计算:2000*2^2000/(1999*2^1999-1998*2^1998)
3、a^2-b^2=ab(ab不等于0),求(a^2)/(b^2)+(b^2)/(a^2)的值.(温馨提示:(a^2-b^2)/ab=(a/b) -(b/a)
1、6(a-b)^5 /[1/3(a-b)^2]=_____.2、计算:2000*2^2000/(1999*2^1999-1998*2^1998) 3、a^2-b^2=ab(ab不等于0),求(a^2)/(b^2)+(b^2)/(a^2)的值.(温馨提示:(a^2-b^2)/ab=(a/b) -(b/a)
1.6(a-b)^5 /[1/3(a-b)^2]=18(a-b)^7
2.2000*2^2000/(1999*2^1999-1998*2^1998)
=2000*2^2000/2^1998(1992*2-1998)
=2000*2^2000/2^1998*2000
=2^2
=4
3.a^2-b^2=ab(ab不等于0),所以两边除以ab得
a^2-b^2/ab=1,(a^2-b^2)/ab=(a/b) -(b/a) =1
(a^2)/(b^2)+(b^2)/(a^2)
=(a/b)^2+(b/a)^2 (-[2*a/b*b/a]+[2*a/b*b/a],凑成差的平方)
=(a/b-b/a)^2+2
=1^2+2
=3
1楼1题估计看错了
1.18a^3+36a^2b-36ab^2+b^3
2.4
3.呵呵,不知呢
2、2000*2^2000/(1999*2^1999-1998*2^1998)上下都除以2^1998
= 2000*2^2/(1999*2-1998)
= 2000*4/2000
=4
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