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The equation 16x^2+y^2+8xy-74x-78y+212=0...

The equation `16x^2+y^2+8xy-74x-78y+212=0` represents:

A

a circle

B

a parabola

C

an ellipse

D

a hyperbola

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JBD PUBLICATION-MODEL PAPER (8)-EXERICSE
  1. G.M of 8 and 18 is:

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  2. The value of lambda for which the lines 3x+4y=5, 5x+4y=4 and lambdax+4...

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  3. The equation 16x^2+y^2+8xy-74x-78y+212=0 represents:

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  4. If y=(sinx)/(1+cosx), then value of (dy)/(dx) is:

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  5. In a single toss of three coins, the probability of getting head and t...

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  6. Find the angle between the minute hand and the hour hand of a clock wh...

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  7. Prove that: tan3A. tan2A. tanA=tan3A-tan2A-tanA

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  8. Find the real numbers x and v if (x -iy) (3 + 5i) is the conjugate of ...

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  9. Prove that the coefficient of x^(n) in (1+x)^(2n) is twice the coeffi...

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  10. Write the middle term in the expansion of (2x^2-1/x)^10.

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  11. A point R with x-co-ordinate 4 lies on the line segment joining the po...

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  12. Find out which of the following sentences are statements and which are...

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  13. Find out which of the following sentences are statements and which are...

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  14. Rewrite the following statement if then in five different ways conveyi...

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  15. There are 210 members in a club. 100 of them drink tea and 65 drink te...

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  16. If y=f(x)=(2x+3)/(5x-2), prove that f(y)=x.

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  17. If sin theta= n sin(theta+2 alpha), show that : tan(theta+ alpha)=(1+n...

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  18. Prove by mathematical induction that 1+3+3^2+…………+3^(n-1)=(3^n -1)/2

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  19. Find the number of words which can be made by using all the letters of...

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  20. If C(n,10)=C(n,12), determine n and hence C(n,5).

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