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## Answers

a+d= 13 ---------------- (i)

a+4d= 25 ---------------- (ii)

on solving both we get

**d = 4**nd

**a = 9**

therefore, 9th term is

a+8d = 9 + 8*4 = 9+32 =

**41**

First term : a

Second term : a+d

Third term : a+2d

.............................

As per the question:

Second term = 13

a + d = 13 ---(i)

and

fifth term = 25

a + 4d = 25 -----(ii)

subtracting (i) from (ii):

a + 4d - a - d = 25 - 13

3d = 12

d = 4

Now, using this in (i):

a + (4) = 13

a = 9

So, we can find the ninth term easily.

Ninth term = a + 8d

= 9 + 8(4)

= 41