BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course
RedeemSearch found 4 matches
geometery triangle question- only one side given
Hi all,
If you could please help me with this triangle question.
thanks!
S
- by sarang
Wed Jun 10, 2009 12:03 am- Forum: Problem Solving
- Topic: geometery triangle question- only one side given
- Replies: 3
- Views: 1587
it is 3^x and not x^3 now what I have done is taken 3^x-1 common from both terms. 3*3*(x-1)=3^(1+x-1) (its a property, remember? if not, I would suggest you better go through it. shouldn't take more than 10 minutes) so we are left with 3^(x-1){3-1} Hope I helped. Thanks Thanks for your help. I foun...
- by sarang
Tue Jun 09, 2009 11:29 pm- Forum: Problem Solving
- Topic: semi-simple exponent question--i'm confused!
- Replies: 4
- Views: 1299
3^x-3^x-1=162 3^(x-1)*(3-1)=162 3^(x-1)=81 x-1=4 x=5 5*4=20 hey, thanks for the response. however I do not understand still. to re-clarify: the question had 3 raised to x subtracting 3 raised to the x minus 1. x^3 - 3^(x-1) I do not understand how you got ...*(3-1)... what happened to the base of 3...
- by sarang
Tue Jun 09, 2009 11:04 pm- Forum: Problem Solving
- Topic: semi-simple exponent question--i'm confused!
- Replies: 4
- Views: 1299
semi-simple exponent question--i'm confused!
Hi all,
I just can't get my head around this simple sounding question. I'd appreciate any help. thanks!
If 3^x - 3^(x-1)= 162, then x(x-1) =?
a)12
b)16
c)20
d)30
e)81
Answer: below
answer is c
- by sarang
Tue Jun 09, 2009 10:33 pm- Forum: Problem Solving
- Topic: semi-simple exponent question--i'm confused!
- Replies: 4
- Views: 1299