Weird math Q from RocketReview

Test Preparation SAT Preparation
1

<p>A question from the practice test at the end of the book:</p>

<p>--</p>

<p>Table:
x | f(x)
1 | 3
2 | 4
3 | 5
4 | 6
5 | 7</p>

<p>According to the table above, if f(f(x)) = 7, then x =</p>

<p>(A) 1
(B) 3
(C) 4
(D) 5
(E) 7</p>

<p>--</p>

<p>Isn't the answer B? Or am I missing something really obvious? Because according to the book its A. p699 of rocketreview.</p>

2

<p>Yeah its B.
Since you are plugging it in twice, just retrace.
7->5; 5->3</p>

3

<p>its B</p>

<p>if it were f(f(f(x))) it would be A</p>

4

<p>b yeeeee....</p>

5

<p>Its B mah dude.</p>

<p>Trace 7 to 5, trace 5 to 3. 3= b.</p>

<p>Iteeeeeee peaceout.</p>