MATH PROBLEM DRIVING ME CRAZY, HELP PLEASE!!!!!!

[jordan723]

Suppose you can fold a paper 120 times (always in the same direction) how many creases would be left in the paper when you unfold it?

1 fold = 1 crease
2 folds = 3 creases
3 folds = 7 creases
4 folds = 15 creases
5 folds = 31 creases

Basically I need to come up with a equation that would allow me to plug in 120 to see how many creases it would have.

PLEASE HELP ME!!! GOOD KARMA!!!

 

[icyyyesr two3]

http://mathway.com/

 

[mnmballa2323]

6 folds = 63 creases
7 folds = 127 creases
8 folds = 255 creases

the pattern is every fold you multiply the last fold by 2 and add 1

 

[jthagreat]

double the previous answer plus 1

2(x) + 1

btw i suck at math so thats not the answer lol

 

[theswoosh]

You need to look at the rate of increase in the folds. once you figure out the patter you can make an equation.

 

[bkdan1]

Originally Posted by jthagreat

double the previous answer plus 1

2(x) + 1

btw i suck at math so thats not the answer lol

Sure isn't. I'll give you a hint, think exponential.

 

[jordan723]

^^^^^^^thanks for helping me but it still doesn't work because it would be impossible to keep doing the same until 120. I need to find an equation related to the input and not the output. Thanks anyways!

 

[il prescelto]

its 2^0 + 2^1 + 2^2 + 2^3 + 2^4.... + 2^n. You can write that in summation notation and put it in a calc easy.

 

[jthagreat]

Originally Posted by bkdan1

Originally Posted by jthagreat

double the previous answer plus 1

2(x) + 1

btw i suck at math so thats not the answer lol

Sure isn't. I'll give you a hint, think exponential.

I dont need the hint broski