Question

if Sn denotes the sum of first n terms of an A.P. What will be the value of S2-S1.
please give quick and accurate answer​

Answer 1

Answer:

T2 = a + d

Step-by-step explanation:

Sn = sum of 1st n terms of AP

S1 = sum of 1st term = nothing but 1st term = a

S2 = sum of 1st two terms = T1 + T2

= a + ( a + d ) = 2a + d

So, S2 - S1

=> 2a + d - a

=> a + d

=> T2