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# Find the value of 'm' if the roots of the equation 2^m X^2 +

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Senior Manager
Joined: 30 Aug 2003
Posts: 328

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Find the value of 'm' if the roots of the equation 2^m X^2 + [#permalink]

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29 Feb 2004, 17:16
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Find the value of 'm' if the roots of the equation 2^m X^2 + 8X + 32^m = 0 are real & equal.

a.1/4
b.4/3
c.3/2
d.2/3
e.
_________________

Pls include reasoning along with all answer posts.
****GMAT Loco****
Este examen me conduce jodiendo loco

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Senior Manager
Joined: 05 Feb 2004
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Location: USA

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29 Feb 2004, 17:51
D!!

b^2 = 4ac
64 = 4*2^m*2^5m
2^6 = 2^(2+m+5m)
6=6m+2
m=2/3....

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Senior Manager
Joined: 30 Aug 2003
Posts: 328

Kudos [?]: 26 [0], given: 0

Location: BACARDIVILLE

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29 Feb 2004, 17:55

_________________

Pls include reasoning along with all answer posts.
****GMAT Loco****
Este examen me conduce jodiendo loco

Kudos [?]: 26 [0], given: 0

29 Feb 2004, 17:55
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# Find the value of 'm' if the roots of the equation 2^m X^2 +

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