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# If f(x, y) = x^2y and f(a, b) = 6, what is f(2a, 4b)?

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Math Expert
Joined: 02 Sep 2009
Posts: 52279
If f(x, y) = x^2y and f(a, b) = 6, what is f(2a, 4b)?  [#permalink]

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17 Dec 2018, 00:59
1
00:00

Difficulty:

25% (medium)

Question Stats:

92% (00:56) correct 8% (01:14) wrong based on 12 sessions

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If $$f(x, y) = x^2y$$ and $$f(a, b) = 6$$, what is $$f(2a, 4b)$$?

A. 6
B. 16
C. 18
D. 36
E. 96

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Joined: 24 Nov 2018
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Location: India
GPA: 3.27
WE: General Management (Retail Banking)
Re: If f(x, y) = x^2y and f(a, b) = 6, what is f(2a, 4b)?  [#permalink]

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17 Dec 2018, 01:10
1
Bunuel wrote:
If $$f(x, y) = x^2y$$ and $$f(a, b) = 6$$, what is $$f(2a, 4b)$$?

A. 6
B. 16
C. 18
D. 36
E. 96

f(a,b)=a^2*b=6
f(2a,4b)=(2a)^2*4b=16*a^2*b=16*6=96.

IMO, option E.
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Re: If f(x, y) = x^2y and f(a, b) = 6, what is f(2a, 4b)? &nbs [#permalink] 17 Dec 2018, 01:10
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