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If xgt 0, then f(x) =x^3+3x is...

If `xgt 0`, then `f(x) =x^3+3x` is

A

decreasing

B

increasing

C

oscillating

D

none

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • If xgt 0 the minimum value of x^x is

    A
    `e^(-1)`
    B
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  • If f(x) = (cos 3x - cos 4x)/( x sin2x), x in 0, f (0) = (7)/(4) then f(x) at x = 0 is

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  • A : The function f(x) =2x^3-3x^2-12x+8 has minimum value R: For the above function f^'(2)=0 and f^' ' (2) gt 0

    A
    Both A and R are true and R is correct explanation of A
    B
    Both A and R are true but R is not correct explanation of A
    C
    A is true R is false
    D
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