If \(h(x)=2x^3-3\) and \(h(m)=-19,\) what is the value of \(m?\)

This topic has expert replies
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8086
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members
VJesus12 wrote:
Tue Aug 18, 2020 8:24 am
If \(h(x)=2x^3-3\) and \(h(m)=-19,\) what is the value of \(m?\)

(A) -3
(B) -2
(C) 2
(D) 6,856
(E) 6,862

Answer: B

Solution:

Since h(m) = 2m^3 - 3, we have:

2m^3 - 3 = -19

2m^3 = -16

m^3 = -8

m = 3^√(-8) = -2

Answer: B

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage