Question

What is the 43rd term of an arithmetic sequence with a rate of increase of -6 and a11 = 12?
HELP ME PLEASE

Answer 1

it is called, common ratio, not rate of increase (but whatever...)

Fast way to do it, without finding \(\large\color{black}{ a_1}\).

\(\large\color{black}{ a_{43}=a_{11}\times r^{43-11}}\)

Answer 2

plug in your values and solve. IF you have any questions, don't hesitate to ask.

Answer 3

idk how

Answer 4

ohh, yeah it is arithmetic... -:(

Answer 5

\(\large\color{black}{ a_{43}=a_{11}+ n(43-11)}\) like this.

Answer 6

what do i put in for a

Answer 7

\(\large\color{black}{ a_{43}=a_{11}+ n(43-11)}\)

\(\large\color{black}{ a_{43}=12+(-6)(43-11)}\)

\(\large\color{black}{ a_{43}=?}\)

Answer 8

-180