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Show that 5+2sqrt(7) is an irrational nu...

Show that 5+2`sqrt(7)` is an irrational number, where `sqrt(7)` is given to be an irrational number.

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X BOARD PREVIOUS YEAR PAPER ENGLISH-CBSE BOARDS 2020-QUESTION
  1. How many cubes of side 2 cm can be made from a solid cube of side 10 c...

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  2. In the given figure, DE||AC and DF||AE. Prove that (BF)/(FE)=(BE)/(E...

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  3. Show that 5+2sqrt(7) is an irrational number, where sqrt(7) is given t...

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  4. Check whether 12^n can end with the digit 0 for any natural number n.

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  5. If A, B and C are interior angles of a DeltaABC, then show that cot(...

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  6. In Figure , a square OPQR is inscribed in a quadrant OAQB of a circle....

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  7. Draw a triangle ABC with side BC = 6 cm, AB = 5 cm and angleABC=60^@. ...

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  8. Draw a circle of radius 3.5 cm . Take a point P outside the circle at ...

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  9. Prove that : (2 cos^(3) theta-cos theta)/(sin theta-2 sin^(3)theta)=c...

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  10. A fraction become 1/3 when 1 is subtracted from the numerator and it b...

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  11. The present age of a father is three years more than three times the...

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  12. Using Euclid's Algorithm, find the largest number which divides 870 an...

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  13. find the ratio in which the y-axis divides the line segment joining th...

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  14. Show that the points A(7, 10), B(-2, 5) and C(3, -4) are the vertices ...

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  15. In an A.P. given that the first term (a) = 54, the common difference ...

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  16. Read the following passage and answer the questions given at the end :...

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  17. Sum of the ares of two squares is 544 m^2. if the difference of their ...

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  18. A solid toy is in the form of a hemisphere surmounted by a right circu...

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  19. For the following data, draw a 'less than' ogive and hence find the me...

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  20. The distribution given below shows the number of wickets taken by bowl...

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