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29 Oct 2006, 10:43
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If c and d are both positive integers greater than 1 and c^d = (1/c)^3d-8, what is the value of c^d?
(1) c=4
(2) d=c^0.5
(1) c=4
(2) d=c^0.5
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29 Oct 2006, 10:49
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We are c^d = (1/c)^3d-8... c^4d-8=1
thus 4d-8=0 d=2
St1..gives us value of C we can find c^d -..suff
st2 ..gives us the value of C we can c^d--suf
Thus answer is D
thus 4d-8=0 d=2
St1..gives us value of C we can find c^d -..suff
st2 ..gives us the value of C we can c^d--suf
Thus answer is D
29 Oct 2006, 10:55
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yogeshsheth, in your computation you equated 4d-8 to 0. But you can also equate it to any number since 1 raised to any number is still 1.
