Find the next two terms in the sequence –5, 8, –13, 20, –29, …. Write a formula for the nth term. Identify the formula as explicit or recursive.

Question

anonymous · Answer

Answer Choices:

amistre64 · Answer

well, an explicit formula will only have an an in it

anonymous · Answer

it should be -5,8,-13,20,-29 if you look at the way of variation of numbers your gonna figure out the trend and what formula it fits in as amistre said for explicit only

amistre64 · Answer

if we ignore the signage, and adjust for it later ... things look "odd" to me :)

anonymous · Answer

see the formula (-1)^n * (n^2+4)

anonymous · Answer

lol right

anonymous · Answer

put the value of n=1 and then n=2 and so on your gonna find it but remember if you dont have the options its gonna be tough to deduce this formula

anonymous · Answer

amistre can you help me in my question at OS feedback please

amistre64 · Answer

that n^2+4 is not recursive tho ...

anonymous · Answer

it is recursive, you gotta remember this thing too (-1)^n

anonymous · Answer

@RichGrl20  does it all help ? lol

amistre64 · Answer

recursive defines the "next term" by the known "previous term(s)"; to find the nth term of a recursive rule means that we either have to determine an explicit rule, or just brute out the rule up to the nth term

amistre64 · Answer

$$recursive~:~a_n=2~a_{n-1}~;~a_1=1$$
$$explicit~:~a_n=2^{n-1}$$