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What is the sum of n terms of the series...

What is the sum of n terms of the series `sqrt2+sqrt8+sqrt18+sqrt32+..`

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RD SHARMA ENGLISH-SOME SPECIAL SERIES-All Questions
  1. Sum of the following series to n term: 3+5+9+15\ +23+........

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  2. Sum of the following series to n term: 1+3+7+13+21+ ............

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  3. Sum of the following series to n term: \ 1+3+6+10+15+.............

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  4. Sum of the following series to n term: 1/(1* 4)+1/(4* 7)+1/(7*10)+ ......

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  5. Find the sum 2+5+10+17+26+. . . .

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  6. Find the sum of the series to n terms :3+7+14+24+37....

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  7. Sum of the following series to n term: 2+4+7+11+16+.......

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  8. Write the sum of the series 2+4+6+8+...........+2n

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  9. Write the sum of the series 1^2-2^2+3^2-4^2+5^2-6^2...........+(2n-1)^...

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  10. Write the sum of n term fo a series whose r^(t h) term is: r+2^rdot

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  11. If sum(r=1)^n r=55 , F i nd sum(r=1)^n r^3dot

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  12. If the sum of first n even natural numbers is equal to k times the sum...

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  13. Write the sum of 20 terms of the series: 1+1/2(1+2)+1/3(1+2+3)+

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  14. If tn denotes the nth term of the series 2+3+6+11+18+... then t(50) ...

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  15. Let Sn denote the sum of the cubes of the first n natural numbers and ...

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  16. If sumn=210, then sumn^2=

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  17. If 1+(1+2)/2+(1+2+3)/3+ddotto\ n terms is Sdot Then, S is equal to a. ...

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  18. What is the sum of n terms of the series sqrt2+sqrt8+sqrt18+sqrt32+..

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  19. The sum of 10 terms of the series sqrt2 + sqrt6 + sqrt18 +... is

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  20. The sum of the series 1^2+3^2+5^2+ ........ n

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