Question

IN an AP if a =3 ,d=2,an=50 find the n and Sn

please answer ​

Answer 1

Answer:

Given :- a = 3 , d = 2 , a = 50

To find :- n and Sn

Solution :- tn = a + ( n - 1 ) x d

= 3 + ( n - 1 ) x 2

= 3 + 2n - 2

= 1 + 2n

n = 1 /2

' n = 1/2 '

Sn = n / 2 [ 2a + ( n - 1 ) x d ]

Answer 2

Answer:

here n is 24

and now we can find Sn by putting the formula

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