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If N be the set of natural numbers is pa...

If N be the set of natural numbers is partitioned into groups `S_(1)=(1),S_(2)=(2,3),S_(3)=(4,5,6), . . .` then the sum of the numbers in `S_(50)` is

A

62525

B

57567

C

62505

D

none

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A
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CENGAGE-PROGRESSIONS -TEST YOURSELF (Level 3) (Multiple Choice Questions)
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  2. How many terms of the series 20+19(1)/(3)+18(2)/(3)+ . . . must be ta...

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  7. If the p^(th), q^(th) and r^(th) terms of an A.P. be a, b, c respectiv...

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  8. Let S(n) denotes the sum of n terms of an AP. If S(2n)=3S(n), then the...

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  15. Let a,b,c,d and e be five real numbers such that a,b,c are in AP, b,c,...

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  16. Find n so that (a^(n+1)+b^(n+1))/(a^(n)+b^(n)) be the AM be and b. (if...

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  18. Find n, so that (a^(n+1)+b^(n+1))/(a^(n)+b^(n))(a!=b) is the GM betwee...

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  19. Find n, so that (a^(n+1)+b^(n+1))/(a^(n)+b^(n))(a!=b) be the HM betwe...

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  20. If a,b and c are in AP then the value of a^(2)(b+c)+b^(2)(c+a)+c^(2)(a...

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