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If f(x)=3x−√x and g(x)=x^2, what is f(g(4))?
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12 Mar 2021, 10:09
12 Mar 2021, 10:09
Expert Reply
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Question Stats:
90% (00:35) correct
10% (00:24) wrong based on 20 sessions
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If \(f(x) = 3x − \sqrt{x }\) and \(g(x) = x^2\), what is \(f(g(4))\)?
A. -4
B. 8
C. 16
D. 32
E. 44
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A. -4
B. 8
C. 16
D. 32
E. 44
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: If f(x)=3x−√x and g(x)=x^2, what is f(g(4))?
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12 Mar 2021, 10:35
12 Mar 2021, 10:35
1
Carcass wrote:
If \(f(x) = 3x − \sqrt{x }\) and \(g(x) = x^2\), what is \(f(g(4))\)?
A. -4
B. 8
C. 16
D. 32
E. 44
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A. -4
B. 8
C. 16
D. 32
E. 44
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
g(x) = x²
g(4) = 4² = 16
So, f(g(4)) = f(16)
f(x) = 3x − √x
So, f(16) = 3(16) − √16
= 48 - 4
= 44
= E
Cheers,
Brent
gmatclubot
Re: If f(x)=3x−√x and g(x)=x^2, what is f(g(4))? [#permalink]
12 Mar 2021, 10:35
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