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The value of ' a ' for which the sum of ...

The value of `' a '` for which the sum of the squares of the roots of the equation `x^2-(a-2)x-a-1=0` assumes the least value a. 3 b. 2 c. 1 d. `0`

A

2

B

3

C

0

D

1

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The correct Answer is:
D
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MOTION-QUADRATIC EQUATION-EXERCISE -1 (OBJECTIVE PROBLEMS)
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  2. If alpha, beta are roots of the equation ax^2 + bx + c = 0 then the...

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  3. The value of ' a ' for which the sum of the squares of the roots of th...

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  4. Let a gt 0, b gt 0 and c lt0. Then, both the roots of the equation ax^...

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  5. If alpha, beta are the roots of quadratic equation x^2 + px + q =0 th...

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  6. If a, b, c are integers and b^2=4(ac + 5d^2), d in N, then roots of th...

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  7. Let a, b and c be real numbers such that 4a + 2b + c = 0 and ab gt 0. ...

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  8. The expression y = ax^2+ bx + c has always the same sign as of a if

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  9. If a ,b in R ,a!=0 and the quadratic equation a x^2-b x+1=0 has imagi...

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  10. If both roots of the quadratic equation (2-x) (x + 1) = p are distin...

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  11. If the equations k(6x^2+3)+rx+2x^2-1=0 and 6k(2x^2+1)+px+4x^2-2=0 have...

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  13. The equations x^2 +5x^2 +px +q=0 and x^3+ 7xa+ px+ r =0have two roots ...

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  14. If alpha,beta,gamma,delta are the roots of the equation x^4-K x^3K x^2...

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  16. If the equation x^(4)-4x^(3)+ax^(2)+bx+1=0 has four positive roots, f...

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  17. Q. If (6x^2-5x-3)/(x^2-2x+6)<=4, then the least and the highest values...

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  18. which of the following graph represents the expression f(x) = ax^2 + b...

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  20. The entire graph of the equation y=x^2+k x-x+9 in strictly above the x...

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