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A person buys national savings certificate of values exceeing of the last years purchase by Rs. 100. after 12years he finds that the total value of certificate purchased by him is Rs. 7,200 find the value of the certificate purchased by him (1) in the fir...

The second term of a g.p. Is 27 and 7th term is 1/9. Find the first term and the common ratio.

For what value of x the numbers x-2,x,x+3 are in g.p.

Find the sum of the series 1+1/3+1/9+1/27+...to n terms.

Find the sum of the series 1-1/2+1/4-1/8+...to n terms.

If a,b,c are in a.p. And a^2,b^2,c^2 are in h.p. And 2b^2=/-ac, then:

Find the sum of the geometric series 1+1/2+1/4+1/8+...to 12th terms, sir how are this question answer 4095/2048

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Stave Please help me

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Sir how are this question answer 1/3[1/2[3-1/3^n-1]]

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Please see that question