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4 votes
123 question time.

Determine a pattern rule for the following sequence, algebraically.

2,3,5,9,17

User Crouch
by
6.6k points

1 Answer

5 votes
whats up with the creepy rabbit

anyway

we see we add 1, add 2 add 3, add4, add 8?
wait
ah,
double and minus 1

f(n)=2f(n-1)-1
and the first term is 2
hmm
it can't be put into an aritmetic sequcne because there isn't a single common differnce

so we wil have to say
f(n)=2f(n-1)-1
where f(1)=2
or in another form

a_n=2a_(n-1)-1
User RavuAlHemio
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6.3k points