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# Let M be the maximum value and N be the minimum value of the

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Manager
Joined: 31 Dec 2003
Posts: 214
Location: US
Followers: 0

Kudos [?]: 9 [0], given: 0

Let M be the maximum value and N be the minimum value of the [#permalink]  06 Sep 2004, 07:53
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Let M be the maximum value and N be the minimum value of the expression (x^2 + y)/y. If a <= x <= b, c <= y <= d, then M â€“ N?

(1) c = 3
(2) a = -2, b = 5 and d = 7

thanks.
Manager
Joined: 27 Aug 2004
Posts: 126
Location: US
Followers: 2

Kudos [?]: 3 [0], given: 0

C

We need to the value of M and N to answer M-N = ?
The equation given is (x^2/y)+1

1) Insufficient. We can not find the value for M & N
2) Insufficient. We don't know whether the value of y is positive or negative.

Both together is sufficient to answer the questions.
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