Question

In An AP if an=3-4n then the common difference is_______

Answer 1

Answer:

HERE YOUR ANSWER

Step-by-step explanation:

Common difference (d) = 4

Given :

= 3 + 4n

To find :

Common difference (d)

Solution :

It is given that,

= 3 + 4n_____(1)

Now,

put n = 1, 2, 3 turn wise. So that we can find ,  and .

For finding ,

put n = 1 in (1)

= 3 + 4 (1)

 = 3 + 4

 = 7

For finding ,

put n = 2 in (1).

= 3 + 4 (2)

 = 3 + 8

 = 11

For finding ,

put n = 3 in (1).

= 3 + 4 (3)

 = 3 + 12

 = 15

So, the AP will be :

7, 11, 15

Here,  = 7

= 11

= 15

Now,

common difference (d) =  -  

common difference (d) = 11 - 7

common difference (d) = 4

Similarly,

common difference (d) =  -  

common difference (d) = 15 - 11

common difference (d) = 4

Hence, the common difference (d) is 4.