Question

find the 7th term from the end of AP 7,10,13.........184, also find the common difference of AP​

Answer 1

Answer:

given A.P 7, 10, 13, .......184

a = 7 , last term = 184

d = a₂ - a₁ = 10 - 7 = 3

thetefore common difference = 3

to find the 7th term from the end, let last term be 'a' and let 'd' = '- d'

therefore a = 184 and d = -3

a₇ from the end = [a + (n-1)d]

=> [184 + (7-1)(-3)]

=> [184 + (-18)]

=> 184 - 28

=> 156