Question

Write an A.P whose n th term is given by 3 + 4n.

Answer 1

Answer:

A.P. is,

7, 11, 15,.....

Step-by-step explanation:

Given,

an = 3+4n

To find first term, put n=1. Then,

a1= 3+4(1) = 3+4 = 7.

To find 2nd term, put n = 2. Then,

a2 = 3+4(2) = 3+8 = 11.

To find 3rd term, put n=3. Then,

A3 = 3+4(3) = 3+12 = 15.

Hope this helps!!!!

Answer 2

Answer:

let n=1

then,3+4×1=7

first term a=7

let n=2

3+4×2=11

second term is 11

d=11-7=4

third term is a+2×d=7+2×4=15

fourth term is a+3d=7+3×4=19

then a.p. is 7,11,15,19