Question

Which is the 25th term of the arithmetic sequence where a1 = 7 and a9 = 71 ?

Answer 1

the general formula is:
an=a1+(n-1)d
from this equation you can determine d
then determine a25

Answer 2

can you give me the answer? I am checking to see if i got it right. my answer is 151.

Answer 3

@ghass1978

Answer 4

There are 8 equal steps between 7 and 71. What is the step size?

Answer 5

What are you talking about? I just need the answer...to check. Am I right or wrong?

Answer 6

you're wrong d=8 so a25=7+24.8=199

Answer 7

okay thank you.