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If a^(2)+b^(2)+c^(2)=2 then the range of...

If `a^(2)+b^(2)+c^(2)=2` then the range of `ab+bc+ca` is

A

`[-1//2,1]`

B

`[-1//2, infty)`

C

`[-1,2]`

D

`[1,infty]`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-FUNCTIONS -EXERCISE -II
  1. If f(x) =x^(2) - 4x+5 then the range is:

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  2. The range of x^(2)+4y^(2)+9z^(2)-6yz-3xz-2xy is

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  3. If a^(2)+b^(2)+c^(2)=2 then the range of ab+bc+ca is

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  4. The range of (x^(2))/(1+x^(2)) is

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  5. The range of the function f(x)=(x^(2))/(x^(4)+1) is

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  6. The range of the function: f(x) =(1-tanx)/(1+tanx) is:

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  7. The range of f(x)=(sinpi[x^(2)-1])/(x^(4)+1) is

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  8. If f:Rrrarr RR and g: RR rarr RR are defined by f(x)=|x| and g(x)=[x-3...

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  9. If f:RR rarr RR is defined by f(x)=[(x)/(2)] for x in RR, where [y] de...

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  10. Range of f(x) =[sin x] is A, Range of f(x) = [tan x] is B then A cap B...

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  11. The range of the function f(x) = cos[x] where -pi/2 lt x lt pi/2 is

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  12. The range of [x] -x is A and x-[x] is B then A cap B =

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  13. If f : R to R is defined by f(x) = [2x]-2[x] for x in R, where [x] is...

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  14. The range of sin log [(sqrt(4-x^(2))/(1-x))] is

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  15. Let f(x) = sinx and g(x) = log|x|.If the ranges of composite functions...

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  16. If f from [-1,1] into [-1,1] defined by f(x) =3x-5 then f is:

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  17. If f: D to R be the function with domain: D={x: -pi/2 lt x lt pi/2} ...

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  18. If f: R to R defined by f(x) ={{:(2x+5, if, x gt 0),(3x-2, if, x le 0...

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  19. If f: R to R is defined by f(x) =x+ sqrt(x^(2)), then f is:

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  20. A={x:-1 le x le 1}, f: A to A defined by f(x) =x|x|. Then f is:

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