Find an equation for the nth term of the arithmetic sequence.
-17, -13, -9, -5, ...

an = -17 x 4(n - 1)
an = -17 + 4(n + 1)
an = -17 + 4(n + 2)
an = -17 + 4(n - 1)

Question

Find an equation for the nth term of the arithmetic sequence. 
-17, -13, -9, -5, ...
 	
	an = -17 x 4(n - 1)
	an = -17 + 4(n + 1)
	an = -17 + 4(n + 2)
	an = -17 + 4(n - 1)

anonymous · Answer

I just need a bit of help i know the pattern has to do with the adding of 4 to get the number but i just dont know if i got the actual sequence right. I got B!

triciaal · Answer

d = 4 correct 
a1  given = -17
to get the nth term use Tn = a1 + (n-1)d

triciaal · Answer

not B,  check your choices using the formula

anonymous · Answer

oh so wouldnt it be d then!? because of the term@triciaal

anonymous · Answer

you there!? @triciaal

anonymous · Answer

@FibonacciChick666 any help?

anonymous · Answer

I know its not B, C, or A so i strobly think its D lol

fibonaccichick666 · Answer

Hey, so for this, you need a recursive sequence yea?

fibonaccichick666 · Answer

So my question to you is, how can you use n+1 if you don't know n?

fibonaccichick666 · Answer

check this website out, you shall find what you seek there https://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html @dirtyblondezzz

triciaal · Answer

yes it would be D