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# For all numbers x, the function f is defined by f(x) = 3x +

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Intern
Joined: 08 Nov 2008
Posts: 38
For all numbers x, the function f is defined by f(x) = 3x + [#permalink]

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08 Nov 2008, 20:42
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

For all numbers x, the function f is defined by f(x) = 3x + 1 and the function g is defined by g(x) =x-1/3 . If c is a positive number, what is the value of g(c)?
(1) f(c) = 13
(2) f(1) = c

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Manager
Joined: 30 Sep 2008
Posts: 111

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08 Nov 2008, 21:04
(1) f(c) = 13 <=> 3c + 1 = 13 <=> c= 4

g(c) = 4 - 1/3 = 11/3 (suff)

(2) f(1) = c <=> 3.1 + 1 = 4 = c
g(c) = 11/3 (suff)

Ans D
Re: function--29   [#permalink] 08 Nov 2008, 21:04
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# For all numbers x, the function f is defined by f(x) = 3x +

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