f(x) = x3 + kx2 - 6x - 9,  k এর মান কত হলে f(3) = 0 হবে?

A 1

B -1

C 2

D 0

Solution

Correct Answer: Option D

f(x) = x+ kx- 6x - 9

f(3) = 3+k.3- (6.3) - 9

     = 27 + 9k - 18 - 9

    = 9k

এখন, f(3) = 0

     বা, 9k = 0

     বা, 9k = 0

    ∴  k = 0

Practice More Questions on Our App!

Download our app for free and access thousands of MCQ questions with detailed solutions