Question

write the first five sequence of ap, an= 3n+2/1+n

Answer 1

Given

write the first five sequence of ap, an= 3n+2/1+n

Solution

• an = 3n + 2/1 + n

If n = 1 then,

→ a1 = 3*1 + 2/1 + 1

→ a1 = 3 + 2/2 = 5/2

If n = 2 then,

→ a2 = 3*2 + 2/1 + 2

→ a2 = 6 + 2/3 = 8/3

If n = 3 then,

→ a3 = 3*3 + 2/1 + 3

→ a3 = 9 + 2/4 = 11/4

If n = 4 then,

→ a4 = 3*4 + 2/1 + 4

→ a4 = 12 + 2/5 = 14/5

If n = 5 then,

→ a5 = 3*5 + 2/1 + 5

→ a5 = 15 + 2/6 = 17/6

First five series sequence of A.P i.e 5/2 , 8/3 , 11/4 , 14/5 , 17/6