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If x+1/x=6 , find (i)x^2+1/(x^2) (i...

If `x+1/x=6 ` , find
(i)`x^2+1/(x^2)`
(ii) `x^4+1/(x^4)`

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RD SHARMA ENGLISH-ALGEBRAIC IDENTITIES-All Questions
  1. If x+y=12 and x y=32 , find the value of x^2+y^2dot

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  2. If 3x+2y=12 and x y=6, find the value of 9x^2+4y^2

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  3. If x+1/x=6 , find (i)x^2+1/(x^2) (ii) x^4+1/(x^4)

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  4. If x^2+1/(x^2)=27 , find the values of each of the following: (i)x+1/...

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  5. Find the products: (i) (2x+3y)(2x-3y) (ii)(x-1)(x+1)(x^2+1)(x^4+1)

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  6. Without actually calculating the cube: (-12)^3+7^3+5^3

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  7. Expand each of the following: (i)(3x+4y)^2 (ii) (3x-4y)^2

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  8. If x-1/x=3, find the value of x^3-1/(x^3)

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  9. If 2x+3y=13 and x y=6, find the value of 8x^3+27 y^3

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  10. If a+b=10 and a^2+b^2=58 , find the value of a^3+b^3

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  11. If x+1/x=7, find the value of x^3+1/(x^3)

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  12. Simplify each of the following expressions: (i) (x+y+z)^2+(x+y/2+z/3)...

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  13. Simplify : (4x+2y)^3+\ (4x-2y)^3

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  14. If x+y=12 and x y=27 , find the value of x^3+y^3

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  15. Prove that: 2a^2+2b^2+2c^2-2a b-2b c-2c a=[(a-b)^2+(b-c)^2+(c-a)^2]

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  16. Expand each of the following (i) (3x+4y)^2 (ii) (3x-4y)^2

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  17. Expand each of the following (i)(sqrt(2)x-3y)^2 (ii) (2x-1/(3x))^2

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  18. Expand each of the following (i)(x/2-y/3)^2 (ii) (x+5)(x-3)

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  19. Find the products: (i)(2x+3y)\ (2x-3y) (ii) (x-1)(x+1)(x^2+1)(x^4+1...

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  20. Find the products: (x-1/x)\ (x+1/x)(x^2+1/(x^2))\ (x^4+1/(x^4))

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