Question

Q.3A) Activity
1) If 10th and 38th terms are 25 & 81.respectively then for finding a &d
Ans:- tn =
-formula
t1o =
-putting value
..at J = 25 (1)
Also
2
tn =
t38 =
- formula
-putting value
= 81_(2)
equation (2) and (1) we get
:: at
20
d
..d =
12 2
Putting (=
in ean (:)
a +
bol
= 25
.. a=​

Answer 1

Step-by-step explanation:

hope you get the right