Question

27. Find the 20th term of the arithmetic sequence 9, 13, 17, 21, ...
28. Find the 17th term of the arithmetic sequence 12, 3, –6, –15, ...

Answer 1

A=9, d is the difference
d=13-9=5
N=20
The formula of arthematic sequence is
a+(N-1).d
Now just put all those values and show me your answer

Answer 2

855? @Haseeb96

Answer 3

a=9
d=13-9=4
n=20
\[t _{n}=a+(n-1)d\]