Question

If the equation  has four solution then be lies in:

Solution

Correct option is

   

  

  

Clearly above equation has 4 real roots if  

                     

  

SIMILAR QUESTIONS

Q1

Let f (x) satisfy the requirement of lagrange’s mean value theorem in [0, 2]. If f (0) and   

 

Q2

Let f : [2, 7] and [0, ) be a continuous and differentiable function.

Then the value of (f (7) – f (2))  is (where c Ïµ (2, 7))

Q3

The equation sin x + x cos x = 0 has at least one root in the interval

Q4

Let f (x) = ax5 + bx4 + cx3 + dx2 + ex, where abcde Ïµ R and f (x) = 0 has a positive root α, then 

Q5

Between any two real roots of the equation ex sin x – 1 = 0, the equation excos x + 1 = 0 has

Q6

f (x) is a polynomial of degree 4 with real coefficients such that f (x) = 0 is satisfied by x = 1, 2, 3 only, then f’(1). f’(2). f’(3) is equal to:

Q7

If f (x) is a polynomial of degree 5 with real coefficients such that  has 8 real roots then f (x) = 0 has:

Q8

If the function f (x) = | x2 + a | x | +b| has exactly three points of non-differentiability, then which of the following can be true?

Q9

If f (x) = loge x and g(x) = x2 and c Ïµ (4, 5), then  is equal to:

Q10

If the function f (x) = x3 – 9x2 + 24x + c has three real and distinct roots αβ and γ then the value of [α] + [β] + [γ] is,: