GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 15 Oct 2019, 19:16

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

The number of real roots of the equation $2^{2x^{2}-7x+5}=1$ is

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Manager
Manager
User avatar
G
Joined: 11 Dec 2013
Posts: 121
Location: India
GMAT Date: 03-15-2015
WE: Education (Education)
GMAT ToolKit User
The number of real roots of the equation $2^{2x^{2}-7x+5}=1$ is  [#permalink]

Show Tags

New post 11 Feb 2019, 22:16
2
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

68% (01:25) correct 32% (01:15) wrong based on 34 sessions

HideShow timer Statistics

The number of real roots of the equation \(2^{2x^{2}-7x+5}=1\) is
A) 0
B) 1
C) 2
D) 3
E) 4

Source : Ignus

_________________
KUDOS will increase your score
NUS School Moderator
avatar
V
Joined: 18 Jul 2018
Posts: 1024
Location: India
Concentration: Finance, Marketing
WE: Engineering (Energy and Utilities)
Reviews Badge
The number of real roots of the equation $2^{2x^{2}-7x+5}=1$ is  [#permalink]

Show Tags

New post 11 Feb 2019, 22:25
2
If \(2^{something} = 1\), then something = 0.

\(2x^2-7x+5 = 0\)
\(2x^2-2x-5x+5 = 0\)
\(2x(x-1)-5(x-1) = 0\)
x = 1 or x = 5/2 = 2.5

2 real roots.

C is the answer.
_________________
Press +1 Kudos If my post helps!
GMAT Club Bot
The number of real roots of the equation $2^{2x^{2}-7x+5}=1$ is   [#permalink] 11 Feb 2019, 22:25
Display posts from previous: Sort by

The number of real roots of the equation $2^{2x^{2}-7x+5}=1$ is

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne