Question

Find the common difference of an arithmetic progression 7,11,15,19...

Answer 1

Answer:

d=term 2-term1

11-7=4

Answer 2

4

Given:

Arithmetic Progression = 7,11,15,19

To Find:

The common difference of the Arithmetic Progression.

Calculating:

The formula to find the common difference of an AP:

= a2 - a1

Substituting the values given to us in this formula we get:

= 11 - 7

= 4

Therefore, the common difference of the Arithmetic Progression is 4.

Some formulas which can be useful while solving Arithmetic Progression problems:

The formula to find the nth term of an AP:

an = a + (n - 1) d

The formula that is used to find the sum of nth term of an AP:

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

The formula that is used to find the sum of nth term of an AP if first term and last term of the AP is given:

Sn = n/2(a + l)