# Math Help - help

1. ## help

If $a_1 = 2$ and $a_{n+1} = (a_n - 1)^2$, then find the value of $a_{17}$ ?

i got answer zero is it correct !

2. Originally Posted by bluffmaster.roy.007
If a1 = 2 and an+1=(an - 1)2, then find the value of a17?

i got answer zero is it correct !
If you show your working it will be easier to review your answer.

3. a1+1=a2=(2-1)^2 =1
a2+1=a3=(1-1)^2=0
so i thought it had a pattern and i think a17 must also be zero is my approach correct

4. Originally Posted by bluffmaster.roy.007
If $a_1 = 2$ and $a_{n+1} = (a_n - 1)^2$, then find the value of $a_{17}$ ?

i got answer zero is it correct !
Yes (now that it's clear that the 2 in the expression was an exponent and not a multiplier).