Question

AP in which
an AP
an = 2n +5​

Answer 1

Answer:

Ap=7,9,11

Step-by-step explanation:

put n as 1 then you obtain 7 then put value of n as 2 then you obtain 9 and so on

Answer 2

Answer:

Therefore the AP is 7 , 9 , 11 , ........

with a = 7 and d = 9 - 7 = 2

Step-by-step explanation:

As we have an = 2n + 5

therefore by putting values of n we will get :-

1) let n = 1

an = 2 ( 1 ) + 5

an = 2 + 5 = 7 ......... (1)

2) let n = 2

an = 2 ( 2) + 5

an = 4 + 5 = 9 ..........(2)

3) let n = 3

an = 2 (3) +5

an = 6 + 5 = 11 ...........(3)

therefore the AP is 7 , 9 , 11 , ........

with a = 7 and d = 9 - 7 = 2