Question

the sum of the three number in AP is 27 the product of frist and last 56 find the number​

Answer 1

Answer:

S³=27

a×l =56

S³=N/2(A+l)

27=n/2(56/l+l)

27 =n/2(56+l²)

27×2=n

56+l²

27= n

28+l²