Question

the nth term of a.p is 2n+5 then the common difference of the A.P is

Answer 1

a (n)= 2n+5

a+(n-1)d= 2n +5

(n-1)d= 2n+5-a

d=(2n+5-a)/n-1

Hope it helps.

Answer 2

The common difference of the A.P is 2.

Step-by-step explanation:

Given : The nth term of A.P is 2n+5.

To find : The common difference of the A.P ?

Solution :

The nth term of A.P is $a_n=2n+5$.

Substitute n=1,

$a_1=2(1)+5$

$a_1=7$

Substitute n=2,

$a_2=2(2)+5$

$a_2=9$

The common difference is $d=a_2-a_1$

$d=9-7$

$d=2$

Therefore, the common difference of the A.P is 2.

#Learn more

Write the common difference of an A.P. whose nth term is an= 3n + 7.

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