Question

Write a possible explicit rule for the nth term of the sequence: 25, 15, 5, -5, -15, ...

an = 35n - 10
an = 35(an-1) - 10
an = 35 - 10(an-1)
an = 35 - 10n

Answer 1

just plug n=1,2,3,4 into each of formula and check which one works

Answer 2

so the only one that worked was the last one
am i correct

Answer 3

yup

Answer 4

oks that makes sense thank you :3