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Given that sqrt(3) is an irrational numb...

Given that `sqrt(3)` is an irrational number, show that `(5 + 2sqrt(3) )` is an irrational number.

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OSWAL PUBLICATION-C.B.S.E 2020 CLASS -X (DELHI)-DELHI SET -I ( SECTION-C )
  1. If a and B are the zeroes of the polynomial f(x) = x^(2) - 4x - 5 then...

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  2. Draw a circle of radius 4 cm. From the point 7 cm away from its centre...

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  3. Draw a line segment of length 8 cm and divides it in the ratio 2: 3

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  4. A solid metallic cuboid of dimension 24 cm xx 11 cm xx 7 cm is melted ...

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  5. Prove that (1 + tan A - Sec A)xx (1 + tan A + sec A) = 2 tan

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  6. Prove that: ("cosec"theta)/("cosec"theta-1)+("cosec"theta)/("cosec"...

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  7. Given that sqrt(3) is an irrational number, show that (5 + 2sqrt(3) ) ...

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  8. An army contingent of 612 members is to march behind an army band of 4...

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  9. Prove that is a right angle triangle, the square of the hypotenuse is ...

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  10. To conduct Sports Day activities, in your rectangular shaped school...

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  11. Solve graphically : 2x +y=8, x-y=1

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  12. A two - digit number is such that product of its digits is 14. If ...

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  13. If 4 times the 4^(th) term of an A.P. is equal to 18^(th) times the 1...

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  14. How many terms of the AP : 24, 21,18,... must be taken so that their s...

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  15. The angle of elevation of the top of a building from the foot of a tow...

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  16. In fig.7.84, DEFG is a square and angleBAC = 90°. Prove that: (i)...

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  17. In the given figure, Delta ABC is an obtuse triangle, obtuse-angled at...

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  18. An open metal bucket is in the shape of a frustum of cone of height 21...

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  19. A solid is in the shape of a cone surmounted on a hemi-sphere, the ...

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  20. Find the mean of the following data.

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