What is the value of x? 1) (-x)^3 = -(x^3) 2) (-x)^2 = -(x^2

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What is the value of x? 1) (-x)^3 = -(x^3) 2) (-x)^2 = -(x^2 [#permalink]

08 Oct 2008, 23:35

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What is the value of x?

1) (-x)^3 = -(x^3)
2) (-x)^2 = -(x^2)
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Re: DS : Good One [#permalink]

09 Oct 2008, 03:08

Fisrt Eq can be satisfied for any Interger Value of X, so a definate value of X is not determined.

2nd Eq can be onyl satisfy for x= 0. So 2nd alone is Good enough.

BTW whats the Ans ?

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Re: DS : Good One [#permalink]

09 Oct 2008, 03:09

AmitGUPTA wrote:

Fisrt Eq can be satisfied for any Interger Value of X, so a definate value of X is not determined.

2nd Eq can be onyl satisfy for x= 0. So 2nd alone is Good enough.

BTW whats the Ans ?

OA is B

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Re: DS : Good One [#permalink]

09 Oct 2008, 03:47

amitdgr wrote:

What is the value of x?

1) (-x)^3 = -(x^3)
2) (-x)^2 = -(x^2)

IMO B
x=0 is the only value when 2 is true

1 is true for any -ve value of x
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Re: DS : Good One [#permalink] 09 Oct 2008, 03:47

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What is the value of x? 1) (-x)^3 = -(x^3) 2) (-x)^2 = -(x^2

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What is the value of x? 1) (-x)^3 = -(x^3) 2) (-x)^2 = -(x^2

What is the value of x? 1) (-x)^3 = -(x^3) 2) (-x)^2 = -(x^2

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