Question

Find the value of n if tn = 95 for the A.P. -1,3,
7,11 ... by completing the following activity.
Find a, d .Formula for t.
Substitute
values of a, d,tn
to find n
​

Answer 1

Answer:

a=-1 d=4 tn=95 n=?

tn=a+(n-1) d

95=(-1)+(n-1) 4

95+1=(n-1) 4

96/4=(n-1)

24=(n-1)

24+1=n

n=25