Question

plz help me ye dono formula lab jab use karte hai airthmetic progression mai class 10​

Answer 1

Answer:

Sum of n terms in an Arithmetic Progression:

Let, the terms a1 a2 a3……an are in AP. If the first term is ‘a’ and its common difference is ‘d’.

The sum of first n terms in arithmetic progressions can be calculated using the formula given below.

S = [(n/2) * (2a + (n – 1) d)]

Here S is the sum, n is the number of terms in AP, a is the first term and d is the common difference.

When we know the first term, a and the last term, l, of AP. Then, the sum of n terms is

S = [(n/2) * (a+l)]

hope it helps.