Question

what is common difference (d) of the A.P 7, 1, -5, -11....?​

Answer 1

given numbers are 7,1,-5,-11

from given the numbers are in arithmetic progression

to find common difference we need to find the difference between two successive numbers

common difference=1-7=-6

therefore the common difference for given data is -6

Answer 2

The common difference (d) of the A.P 7 , 1 , - 5 , - 11 . . . is - 6

Given :

The AP is 7 , 1 , - 5 , - 11 . . .

To find :

The common difference

Solution :

Step 1 of 2 :

Write down the given AP

The AP is

7 , 1 , - 5 , - 11 . . .

Step 2 of 2 :

Find the common difference

First term = a₁ = 7

Second Term = a₂ = 1

Third term = a₃ = - 5

Fourth term = a₄ = - 11

Hence the required common difference

= Second Term - First term

= a₂ - a₁

= 1 - 7

= - 6

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