Question

for finding the value of ap when 7 2 a b are in ap

Answer 1

ap :- 7,2,a,b

first term a= 7, d = 2-7 = -5

a3 =

a+ (n-1)d = 7+(3-1)(-5) = -3

=>value of a in ap = -3

a4 = 7+(4-1)(-5) = -8 = b

hence the ap is 7,2,-3,-8