Question

If the product of the roots of the equation $8x^{3} - 14x^{2} + 7x - 1 = 0$ be 2, then the sum of roots is.

• A. 1
• B. –1
• C. 2
• D. –2

Answer 1

Answer: (B)

–1

Answer 2

It is given that

$\frac{3ABC - B^{3}}{A^{3}}$⇒$\frac{3ABC + B^{3}}{A^{3}}$⇒$\frac{B^{3} - 3ABC}{A^{3}}$

Also $\frac{B^{3} - 3ABC}{B^{3}}$

Putting this value of a, we get sum of roots

$\alpha,\beta$.