Maths problem
回答 (2)
2007-10-19 7:28 pm
✔ 最佳答案
(-7/x^-5)^-2 x (49x^-8) = (-7x^5)-2 x (49x^-8)
= [(-7)^-2] (x^-10) x (49x^-8)
= (1/49)(x^-10) x (49x^-8)
= (1/49)(49) x^(-10-8)
= x^-18
= 1 / x^18
If there is a mistake, please feel free to point out.
參考: My Maths knowledge
2007-10-19 6:41 pm
(-7 / x-5)-2 X (49x-8)
= (x5 / -7)2 X (72x-8)
= x5(2) / (-7)2 X 72x-8
= 72 / 72 x10 + (-8)
= x2
= (x5 / -7)2 X (72x-8)
= x5(2) / (-7)2 X 72x-8
= 72 / 72 x10 + (-8)
= x2
參考: Myself~~~
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