Question

find the value of k if 4x3-2x2+Kx+5​

Answer 1

Step-by-step explanation:

let,

f(x) = 4x^{3}-2 x^{2} + kx +5f(x)=4x

3

−2x

2

+kx+5

it is divided by 2x+1=0

⇒ value of x=-1/2

(u can find it out by:

2x+1=0 ∴ x=-1/2

)

remainder=-10

f(- \frac{1}{2} )=4( - \frac{1}{2}^{3} )-2( - \frac{1}{2})^{2} +k(- \frac{1}{2})+5=-10f(−

2

1

)=4(− 2/1 3 )−2(− 2/1) 2+k(− 2/1 )+5=−10

solving the above equation ans is : k=28

Answer 2

Answer:

k=-13÷x

Step-by-step explanation:

12-4+kx+5=0

13+kx=0

kx=-13

k=-13÷x