Question

Complete the following activity to find the 19^th term of an A.P. 7, 13, 19, 25, ........ :

Activity: 

Given A.P. : 7, 13, 19, 25, ..........

Here first term a = 7; t₁₉ = ?

t_n + a + `(square)`d .........(formula)

∴ t₁₉ = 7 + (19 – 1) `square`

∴ t₁₉ = 7 + `square`

∴ t₁₉ = `square`

Answer 1

Given, A.P. : 7, 13, 19, 25, ..........

Here, first term a = 7; t₁₉ = ?

t_n + a + (n  – 1)d .........(formula)

∴ t₁₉ = 7 + (19 – 1)6

∴ t₁₉ = 7 + 108

∴ t₁₉ = 115