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(x^3)*(y^4) = 5000, y =? 1) y is a positive integer

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Senior Manager
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Joined: 19 May 2004
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(x^3)*(y^4) = 5000, y =? 1) y is a positive integer [#permalink] New post 11 Dec 2004, 02:22
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A
B
C
D
E

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(x^3)*(y^4) = 5000, y =?

1) y is a positive integer

2) x is a integer
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 [#permalink] New post 11 Dec 2004, 02:44
I will say A.

1) Since y is a positive integer and 5000 = (+5)^4 * 2^3, y has to take on the value of 5.

2) we do not know if y is + or - 5.
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 [#permalink] New post 11 Dec 2004, 14:57
I pick C

y must be positive cause power is even. But we need to be sure x is an integer as well to avoid (1/n) power issues...
Then the prime factors split provides y value.
  [#permalink] 11 Dec 2004, 14:57
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(x^3)*(y^4) = 5000, y =? 1) y is a positive integer

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