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If the function f(x)=(Ksinx+2cosx)/(sinx...

If the function `f(x)=(Ksinx+2cosx)/(sinx+cosx)` is strictly increasing for all values of `x ,` then `K<1` (b) `K >1` `K<2` (d) `K >2`

A

` K lt 1 `

B

`K gt 1 `

C

`K lt 2`

D

`K gt 2`

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The correct Answer is:
D
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OBJECTIVE RD SHARMA ENGLISH-INCREASING AND DECREASING FUNCTIONS-Exercise
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  2. On which of the following intervals in the function f(x)=2x^2-log|x|,x...

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  3. If the function f(x)=(Ksinx+2cosx)/(sinx+cosx) is strictly increasing ...

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  4. The function f(x)=(asinx+b cosx)/(c sinx+d cos x) is decreasing, if

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  5. If f(x)=k x^3-9x^2+9x+3 monotonically increasing in R , then k<3 (b) ...

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  7. The function y=x^3-3x^2+6x-17

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  11. the function(|x-1|)/(x^(2)) is monotonically decreasing at the point

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  12. Find the value of a in order that f(x)=sqrt(3)sinx-cosx-2a x+b decreas...

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  14. A condition for a function y=f(x) to have an inverse is that it should...

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  15. Let g(x)=f(x)+f(1-x) and f''(x)<0, when x in (0,1). Then f(x) is

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  16. The function f(x)=(ln(pi+x))/(ln(e+x)) is

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  19. If a lt 0 and f(x)=e^(ax )+ e^(-ax) is monotonically decreasing . F...

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