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The value of a so that the sum of the sq...

The value of a so that the sum of the squares of the roots of the equation `x^(2)-(a-2)x+1-a =0` assumes the least value is -

A

3

B

2

C

1

D

-1

Text Solution

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ ZONE 3 -Question Paper 8
  1. If the line 2x+sqrt(6)y=2 is a tangent to the hyperbola x^(2)-2y^(2)=...

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  2. The equation of the normal to the curve x^(3)+y^(3)=8xy at the point w...

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  3. The curve x=1-3t^(2), y=t-3t^(3) is symmetrical with respect to -

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  4. The equation of the curve in which the portion of the tangent between...

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  5. The equation of the normal to the parabola y^(2)=5x. Which makes an a...

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  6. The maximum value of Z=3x+4y subject to the constraints x+y le 40, x...

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  7. The minimum value of (1)/(2)(7-cos2x) is -

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  8. If g(x)=min(x, x^(2)) where x is a real number then -

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  9. The value of a so that the sum of the squares of the roots of the equ...

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  10. Twenty metres are available to fence a land in the form of a circular...

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  11. Area ( in square unit) of the greatest rectangle that can be inscribe...

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  12. The point on the parabola 2y=x^(2), which is nearest to the point (0,...

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  13. Let f(x) be a differentiable function. If h(x)=(1)/(3) {f(x)}^(3)+{f...

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  14. What is the value of b for which the function f(x)=sinx-bx+c is decre...

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  15. The radius of a circular plate is increasing at the rate of 0.01 cm/s ...

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  16. A spherical balloon is being inflated at the rate of 35 cm^(3)/min. Th...

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  17. Electric current C, measured by a galvanometer, is given by the equati...

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  18. The value of Var (4x+3) is

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  19. If the side of an equilateral triangle increases at the rate of sqrt(3...

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  20. If y=3x^(2)+2 and if x changes from 10 to 10.1, then the approximate ...

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