Question

1. If sum of the zeroes of 2x^3+kx^2-4x+9 is 4, then the value of k is​

Answer 1

The sum of the zeroes of the equation

ax 3+bx2 +cx+d is −b/a

Here the equation is 2x

3 −3kx 2 +4x−5

⇒ Sum of roots=3k/2

⇒ 3k/2=6

⇒ k=4