Question

Find an equation for the nth term of the arithmetic sequence.

a19 = -58, a21 = -164

Answer 1

an = 896 - 53(n - 2)

an = 896 - 53(n - 1)

an = 896 + 53(n + 1)

an = 896 - 53(n + 1)

Answer 2

@cwrw238 @lgbasallote @Zekarias

Answer 3

\[a_{19}=a_{1}+18d ....and..a_{21}=a_{1}+20d\]Now find \[a_{1}..and..d\]You will get the answer\[a_{n}=896-53(n-1)\]