Question

10) What is the common difference of an A.P. where an =3n-2​

Answer 1

Answer:

D = 4-1 = 3

Step-by-step explanation:

Let N = 1 then 3x1 - 2 = 1

Let N = 2 then 3x 2 - 2 = 4

Let N = 3 then 3 x 3 - 2 = 7

The series is 1,4,7

if a = 1

then Common Difference (D) = 4 - 1 =3

Answer 2

Answer:

3

Step-by-step explanation:

Here we are given the general formula an =3n-2​ which represents the nth term of a particular AP.

So we can find out the first three terms by putting the value of n =1,2,3 respectively

∴ First term = 3(1) -2 = 1

Second term = 3(2) - 2 = 4

Third term = 3(3) -2 = 7

Hence we get the series as 1,4,7, and so on

Common difference = 4 - 1 = 7 - 4 = 3

Hence d = 3

[Answering tip : think about what purpose does the information given in the question serve and what known formula is it similar to]