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If [a+(1//a)]^2-2 [a-(1//a)]=12, then wh...

If `[a+(1//a)]^2-2 [a-(1//a)]=12`, then which of the following is a value of ‘a'?

A

`-8+sqrt3`

B

`-8-sqrt3`

C

`-8+sqrt5`

D

None of these/इनमें से कोई नहीं

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CHAMPION PUBLICATION-2017 TIER-II PAPER(8)-EXERCISE
  1. A root of equation ax^2+ bx+c=0 (where a, b and c are rational numbers...

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  2. If x=(a//b) + (b//a), y = (b//c) + (c//b) and z=(c//a) + (a//c), then ...

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  3. If [a+(1//a)]^2-2 [a-(1//a)]=12, then which of the following is a valu...

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  4. If x^2-4x+ 1 =0, the what is the value of x^9 + x^7 - 194x^5 - 194x^3?

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  5. If x+y=3, then what is the value of x^3 + y^3 + 9xy? यदि x+y=3 हो,...

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  6. A=(x^8-1)//(x^4+1) and B=(y^4-1)//(y^2 +1).If x= 2 and y = 9, then wha...

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  7. If x- 4y = 0 and x+ 2y = 24, then what is the value of (2x + 3y) /(2x-...

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  8. If (x/a) + (y/b) = 3 and (x/b)-(y/a) = 9, then what is the value of x/...

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  9. In the given figure, OX, OY and OZ are perpendicular bisector of the t...

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  10. In a triangle PQR, anglePQR=90^(@), PQ = 10 cm and PR = 26 cm, then wh...

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  11. In the given figure, if (QR)/(XY)=(14)/(9) and PY = 18 cm, then what i...

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  12. In a triangle PQR, PX, QY and RZ be altitudes intersecting at O. If PO...

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  13. A line cuts two concentric circles. The lengths of chords formed by th...

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  14. In the given figure, a circle touches the sides of the quadrilateral P...

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  15. In the given figure, from the point P two tangents PA and PB are drawn...

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  16. In the given figure, AB is a diameter of the circle with centre O and ...

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  17. In the given figure, PQ is a diameter of the semicircle, PABQ and O is...

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  18. In the given figure, E and F are the centers, of two identical circles...

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  19. In a right angle triangle ABC, what is the maximum possible area of a ...

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  20. In the given figure, PQRS is a square of side 8 cm. angle PQO = 60^@. ...

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