If α and β are the zeroes of p(x) = 16x2 +4x -5, find the value of
1/α + 1/β.
Answers
Answer:
1/α + 1/β = 4/5
Step-by-step explanation:
Given : zeroes of the polynomial 16x²+4x-5 is α (alpha) and β (beta).
Here, a(coefficient of x²) = 16
b(coefficient of x) = 4
c(constant term) = - 5
Sum of zeroes of the polynomial = - (coefficient of x) / (coefficient of x²)
α + β = - b/a
α + β = - (4) / 16
α + β = - 1/4 —————————— (i)
Product of zeroes of the polynomial = (constant term) / (coefficient of x²)
α × β = c/a
αβ = - (5) / 16
αβ = - 5/16 —————————— (iI)
1/α + 1/β = (α + β) / (αβ)
= (-1/4) / ( -5/16) —————————— from (i) and (ii)
∴ 1/α + 1/β = 4/5