BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
Live EA class + 6 months of EA OnDemand
  • Expert-led weekly online sessions
  • EA Masterclass access between classes
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

130-point score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Krish PS - 1

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Thu Jun 26, 2008 4:23 pm
by KrishMBA » Mon Dec 29, 2008 7:53 pm
Hi,

For which of the following is f(x) = f(1-x) for all x ?

Choices are:

1. f(x) = 1-x
2. f(x) = 1-x^2
3. f(x) = x^2 - (1-x)^2
4. f(x) = x^2(1-x)^2
5. f(x) = x / 1-x


The answer is choice 4 but could someone please explain the solution ?

Thanks,
Krish
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 37
Joined: Wed Sep 17, 2008 8:17 pm
Location: India
Thanked: 4 times

Re: Krish PS - 1

by Sachindh » Mon Dec 29, 2008 7:57 pm
KrishMBA wrote:Hi,

For which of the following is f(x) = f(1-x) for all x ?

Choices are:

1. f(x) = 1-x
2. f(x) = 1-x^2
3. f(x) = x^2 - (1-x)^2
4. f(x) = x^2(1-x)^2
5. f(x) = x / 1-x


The answer is choice 4 but could someone please explain the solution ?

Thanks,
Krish
A simple way is to replace the 'x with (1-x) and the value of f(x) should not change.
So, If you look at the options only 4 is that which does not change if I change x by (1-x).

I hope it helps.
Thanks
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Thu Jun 26, 2008 4:23 pm

by KrishMBA » Mon Dec 29, 2008 8:11 pm
Hi Sachin,

Thanks for your reply... But could you please provide an example or show how option 4 is correct ...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 37
Joined: Wed Sep 17, 2008 8:17 pm
Location: India
Thanked: 4 times

by Sachindh » Mon Dec 29, 2008 8:17 pm
KrishMBA wrote:Hi Sachin,

Thanks for your reply... But could you please provide an example or show how option 4 is correct ...
Take option 4
f(x) = x^2(1-x)^2
f(1-x) = (1-x)^2(1-(1-x))^2
f(1-x) = (1-x)^2 (1-1+x)^2
f(1-x) = (1-x)^2 (0+x)^2
f(1-x) = f(x)

Now in other cases this shall not be true.

Thanks
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Thu Jun 26, 2008 4:23 pm

by KrishMBA » Mon Dec 29, 2008 8:59 pm
Thanks Sachin !
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1