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If the quadratic equation `(b-c)x_2+(c-a)x+(a-b)=0` has equal roots, then show that `2b=a+c`.

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SUBHASH PUBLICATION-ANNUAL EXAMINATION QUESTION PAPER JUNE-2019 (WITH ANSWERS)-EXERCISE
  1. If cosec theta=(13)/(12) then find the value of cos theta.

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  2. tan A . Sin A+ cos A=secA

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  3. Draw a pair of tangents to a circle of radius 5 cm which are inclined ...

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  4. A box contains 90 discs. Which are numbered from 1 to 90. If one disc ...

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  5. A metallic sphere of radius 9cm is melted and recast into the shape o...

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  6. The faces of two cubes of volume 125 cm^3 each are joined together to ...

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  7. Prove that the "Length of tangents drawn from an external point a circ...

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  8. Two concentric circle of radii 5 cm and 3cm are drawn. Find the length...

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  9. Construct a triangle with sides 5 cm, 6 cm and 7 cm and then another t...

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  10. Find the mode for the following data in the frequency distribution tab...

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  11. Find the median for the following data in the frequency distribution t...

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  12. From the of a vertical building of 50sqrt3 m height on a level ground...

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  13. Two windmills of height 50m and 40sqrt3 m are on either side of the fi...

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  14. The following table gives production yield per hectare of wheat of 100...

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  15. A cone is having its base radius 12 cm and height 20 cm. If the top of...

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  16. The sum o the fourth and eighth terms of arithmetic progression is 24 ...

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  17. Prove that "In a right triangle, the square of the hypotenuse is equal...

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  18. Solve graphically 2x+y=8 x-y=1

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  19. The ages of two students A and B are 19 years and 15 years respectivel...

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  20. If the quadratic equation (b-c)x2+(c-a)x+(a-b)=0 has equal roots, then...

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