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Find sum of 5 + 55 + 555 + ... to n term...

Find sum of 5 + 55 + 555 + ... to n terms.

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The sum of first 9 terms of an arithmetic sequence is 45 and the sum of first 18 terms is 171 a) What is the sum of its 10^(th) to 18^(th) terms? b) What is its 5^(th) term? c) Find its 14^(th) term. d). Find the sum of 5^(th) to 14^(th) terms.

The sum of first 9 terms of an arithmetic sequence is 45 and the sum of first 18 terms is 171. Find the sum of 5^(th) to 14^(th) terms.

Consider the GP 3,6,12,…… Find the value of n so that sum to n terms of this GP is 381.

Find the sum of the first n terms of the arithmetic sequence 1/n,3/n,5/n,7/n ,.......

Find the sum of the first n terms of the series whose nth term is n(n+3) .

Sum of the first 4 terms of an arithmetic sequence is 72. Sum of the first 9 terms is also 72. Find the sum of the first five terms.

Find the sum of the 1^(st) n terms of the series 3+7+13+21+31+ …

Find the sum of the first n terms of the series : 3+7+13+21+31+. . .

Consider the G.p 3, 6, 12…Find its n^th term and sum to n terms

Sum of first n terms of an arithmetic sequence is 8n^2 +5n. Find the sum of first 20 terms.

A N EXCEL PUBLICATION-SEQUENCES AND SERIES-QUESTION BANK
  1. The fourth, seventh and the last term of a G.P. are 10,80 and 2560 res...

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  2. The first term of a G.P is 1. The sum of the third and fifth terms is ...

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  3. Find sum of 5 + 55 + 555 + ... to n terms.

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  4. If x=1 +a + a^2+…. to oo, where |a| lt1 and y=1+b+b^2+… to oo , where ...

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  5. A square is drawn by joining the mid points of the sides of a square. ...

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  6. Find the 20^(th) and n^(th) terms of the G.P. 5/2,5/4,5/8,…

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  7. Find the 12^(th) term of a G.P. whose 8^(th) term is 192 and the commo...

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  8. The 5^th, 8^th and 11^th terms of a GP are p, q and s respectively. Pr...

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  9. The 4^(th) term of a G.P. is square of its second term and the first t...

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  10. Which term of the following sequences 2,2sqrt2,4…is 128?

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  11. Which term of the following sequences sqrt3,3,3sqrt3,...is 729?

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  12. Which term of the following sequences 1/3,1/9,1/27,...is1/19683?

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  13. Find the sum to 20 terms of 0.15,0.015,0.0015,..

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  14. For what value of x, the numbers -2/7,x.-7/2 are in G.P ?

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  15. Find the sum to n terms of the G.P.sqrt7,sqrt21,3sqrt7…

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  16. Find the sum to n terms of the G.P. 1,-a,a^2,-a^3,...(ane-1)

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  17. Find the sum to n terms of the G.P.x^3,x^5,x^7,…(xne+-1)

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  18. Evaluate underset(K=1)overset11sum(2+3^K)

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  19. The sum of the first three terms of a GP is (39)/(10) and their produc...

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  20. How many terms of the G.P.3,3^2,3^3,… are needed to give the sum 120?

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