Question

What is the 32nd term of the arithmetic sequence where a1 = 15 and a13= -57

Answer 1

oh gosh letme think

Answer 2

what grade are you in :O

Answer 3

9

Answer 4

oh im in 7th, thats why i dont get it v.v sorry

Answer 5

a1 = 15
a13 = -57

in 12 iterations you dropped (15+57) = 72

therefore you dropped 72/12 = 6 per iteration

\[A _{n} = A _{n-1}-6\]
therefore
\[A _{32} = 15-6(31)\]

Answer 6

thank you