Question

if 6th and 13th terms of an angle are O and 14 respectively find the first term and common difference

Answer 1

See the attach file for ur ans

Answer 2

Hi !

a₆ = 0
a + 5d = 0             --> [1]

a₁₃ = 14
a + 12d = 14        --> [2]

(2) - (1)

   a + 12d = 14
 - a + 5d = 0
------------------------
7d = 14

d = 2

a + 5d = 0

a + 10 = 0

a = -10

∴ First term = a = -10
Common difference = d = 2