Question

the nth term of an Ap Is p and the sum of their n term is S.Then first term is (a)2s/n -p (b) 2s/n +p (c) 2s/p -n (d) 2s/n

Answer 1

See the clicked attachment

Answer 2

Hey there !!

Given ;-

→ $a_n$ = p .

→ $S_n$ = S .

To find :-

→ a₁ .

Solution :-

Using identity :-

$S_n = \frac{n}{2} ( a_1 + a_n ) .$

⇒ S = n/2 ( a₁ + p ) .

⇒ S × 2 = n( a₁ + p ) .

⇒ 2S/n = a₁ + p .

∴ a₁ = $\huge \boxed{ \bf \frac{2S}{n} - p . }$  

Hence, option A is correct i.e., 2S/n - p .

THANKS

#BeBrainly .