Question

Sn-Sn-1=....... a.an b.an+1 c.an-1 d.none of these

Answer 1

Answer:

a. an b. an c. an what is this

Answer 2

a) aₙ

Step-by-step explanation:

Here

$Sₙ = a₁+a₂+a₃+...+aₙ₋₁ +aₙ$

$Sₙ₋₁ = a₁+a₂+a₃+... +aₙ₋₁$

Substracting the two equation, we get

$Sₙ - Sₙ₋₁ = aₙ$