Question

The 5th term of an arithmetic sequence is 38 and 9th term is 66.what is it's 25thterm?

Answer 1

hello Frnd

here is your answer


pls take a look at the pic



hope it helps
#jerri

Answer 2

5th term= a+4d
Or 38=a+4d -equation 1
9th term=a+8d
Or 66=a+8d -equation 2
Eq.1-eq2
Or a+4d=38
a+8d=66
- - -
Or -4d= -28
Or d=28/4
d=7
Putting value of d in equation 1
a+4d=38
Or a+28=38
Or a=38-28
Or a=10
Now 25th term
25th term = a+24d
Or 10+24*7
Or 25th term=10+168
Or 25th term=178