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Prove that 3 + 2 sqrt 5 is irrational....

Prove that `3 + 2 sqrt 5` is irrational.

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BEYOND PUBLICATION-MODEL PAPER-EXERCISE
  1. A contractor construction job specifies a penalty for delay of complet...

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  2. A rectangular park is to be designed whose breadth is 3 m less than it...

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  3. Prove that 3 + 2 sqrt 5 is irrational.

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  4. If A - {x|x is a prime number and x < 20} B = {x|2x + 1, x in w and x<...

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  5. If A - {x|x is a prime number and x < 20} B = {x|2x + 1, x in w and x<...

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  6. If A = {x//x is a prime number and x<20 } then B = {x//2x+1, x in w ...

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  7. If A = {x//x is a prime number and x<20 } then B = {x//2x+1, x in w ...

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  8. The coach of a cricket team of M.K.Nagar High School buys 3 bats and 6...

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  9. Solve the qudratic polynomial x^(2) - 3x-4 by graphical method.

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  10. The H.C.F of 31, 43 and 47 is…………

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  11. If x+y+z =xyz, then sum(2x)/(1-x^(2))=

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  12. n(A) = 14, n(B)= 11, n(AnnB)=19 then n(AuuB)=…..

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  13. If a fraction becomes 2 when 9 is added to its numerator and 1 when 2 ...

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  14. The sum of squares of two consecutive positive even numbers is 340, th...

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  15. Which term of G.P. 3, 3sqrt(3), 9, ……. equals to 243?

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  16. If sqrt a + sqrt b is an irrational number, then which of the followin...

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  17. The graph y=ax+b is a straight line which intersects X-axis at

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  18. If x^2+ax+b=0,x^2+bx+a=0 have a common roots then

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  19. Coefficient of x in a polynomial ax^2 + bx + c is '0'. Then its zeroes...

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  20. The series (n-1),(n-2),(n-3),…. Is a type of

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