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If sum n=210, then sum n^2 is equal to:...

If `sum n=210`, then `sum n^2` is equal to:

A

2870

B

2670

C

2570

D

none of these

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JBD PUBLICATION-MODEL PAPER (9)-EXERCISE
  1. If (1-i)/(1+i)=x+iy, then x^2+y^2 is equal to:

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  2. The number of permutations of all letters of word 'EXERCISES' is:

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  3. If sum n=210, then sum n^2 is equal to:

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  4. Slope of the line which cuts off intecepts of equal length on the axis...

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  5. The equation of circle having centre (0,0) and area 154 sq. units.

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  6. underset(xrarr0)lim (sqrt(1+x)-1)/x is equal to:

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  7. Six boys and six girls sit in a row randomly. The probability that the...

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  8. If costheta+sintheta=sqrt2costheta ,then show that costheta-sintheta=...

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  9. An angle alpha is divided into two parts such that ratio of the tangen...

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  10. Express (5 - 3i)^3 in the form a + ib .

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  11. If the 2nd , 3nd and 4th terms in the expansion of (x + y)^(n) are...

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  12. Find the middle terms in the expansion of (3-x^(3)/6)^(7)

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  13. Three vertices of parallelogram ABCD are A(3,-1,2), B(1,2,-4), C(-1,1,...

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  14. Write down the truth value of the following: The number 19 is prime.

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  15. Write down the truth value of the following: Every square is a rectang...

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  16. Write the contra positive of the following statements: If you are born...

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  17. Contrapositive of the statement If a number is divisible by 9. then it...

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  18. Let A and B be two non empty sets, then show that AxxB=BxxA. If A=B

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  19. Let A={1,2,3}, B={2,3,4} and C={4,5}.n verify that: Axx(BcupC)=(AxxB)c...

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  20. Prove that sin7x + sin5x + sin3x + sinx = 4cosx cos2x sin4x

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