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Verify by the method of contradiction that ` sqrt7` is irrational number

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OSWAAL PUBLICATION-SAMPLE PAPER 4-EXERCISE
  1. The sum of first three terms of a G.P. is 13/12 and their product is –...

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  2. Find the equation of the parabola with vertex at the origin axis along...

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  3. Differentiate:x+1/x from first principle.

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  4. Verify by the method of contradiction that sqrt7 is irrational number

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  5. A bag contains 9 dics of which 4 are red,3 are blue and 2 are yellow. ...

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  6. A bag contains 9 discs of which 4 are red 3 are blue and 2 are yellow....

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  7. A bag contains 9 discs of which 4 are red 3 are blue and 2 are yellow....

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  8. If E and F are events such that P(E )=(1)/(4),P(F)=(1)/(2)" and P(E an...

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  9. If E and F are two events such that P(E)=1/4, P(E)=1/2 and P(E and F)=...

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  10. Draw the graph of the signum function write its domain and range.

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  11. Prove that cos 2x cos "" x/2 -cos 3x cos " (9x)/(2) = sin 5x sin ""...

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  12. 10^(2n-1)+1 is divisible by 11.

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  13. Find the number of ways of selecting 9 balls from 6 red balls, 5 white...

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  14. P(a,b) is the midpoint of the line segment between axes,Show that the ...

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  15. Derive the formula for the distance between two points(x1,y1,z1) and (...

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  16. Prove that underset (x rarr 0) lim (sin x)/x=1,where x is in radian an...

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  17. The mean and standard deviation of 100 observations were calculated as...

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  18. Derive the equation of the ellipse in the form (x^(2))/(a^(2))+(y^(2))...

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  19. Find the derivative of (2)/(x+1)-(x^(2))/(3x-1)

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  20. Find the sum to n terms of the series ,(1)/(1.2)+(1)/(2.3)+(1)/(3.4)+....

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