Question

determine the 100th term of arithmetic sequence with t7=465 and t13=219. plz show me the procedure, thats what i have trouble with.

Answer 1

a = the value of the first term,
d = the difference between two consecutive terms
Let's look at the 7th term:

Answer 2

t7= a+6d=465...............1

Answer 3

Then t13= a+12d=219................2

Answer 4

Solve equations (1) and (2)
to find a and d

Answer 5

ahh, i see
i can do the rest, thank you!

Answer 6

welcome