# Algebra Question

• October 5th 2010, 12:54 PM
hsidhu
Algebra Question
• October 5th 2010, 03:04 PM
emakarov
Hint: expand $(1+x)^n$ according to the Binomial formula.
• October 5th 2010, 04:24 PM
TurkishEconomist
it does not worth yelling :) just think a n-length digit that should be composed of 1 or 0's. We can determine how many digit can we write starting from chhosing the place of zero's.. or just determining each place's possible number(as zero or one.)

So first way will give you the function you say and other one will give you 2^n
• October 6th 2010, 03:15 AM
HallsofIvy
Quote:

Originally Posted by TurkishEconomist
it does not worth yelling :) just think a n-length digit that should be composed of 1 or 0's. We can determine how many digit can we write starting from chhosing the place of zero's.. or just determining each place's possible number(as zero or one.)

So first way will give you the function you say and other one will give you 2^n

?? The function given is equal to 2^n!
• October 6th 2010, 03:48 AM
emakarov
Isn't f(2) = 3^n?