GMAT Quantitative Reasoning Practice Test 1

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Question : 67 of 100

Marks: +1, -0

If

y=

6^x

, then

6 y

equals

$x \; 6$
$x+1\;\; 6$
$x+6\;\;\;6$
$6\;\;\;\; x-1$

Solution:

Since

y=6^x

, multiplying each side of the equation results in

6 y=6 (6^x)

. Recall that since

6=6^1, 6^x × 6^1=6^{x+1}

by the laws of exponents.

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