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If `n^(th)` terms of the sequence `{a_(n)}` where `a_(n)=(-1)^(n-1)5^(n+1)`, find `a_(1),a_(2)`, and `a_(3)`is

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MODERN PUBLICATION-SEQUENCES AND SERIES-FAQs
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  4. The n^( th) term of an A.P. is a(n)=3+2n, then the common difference i...

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  5. Determine the sum of first thirty five terms of an arithmetic progress...

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  6. The twelfth term of an A.P. is (-13) and the sum of its first four ter...

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  7. The sum of first 6 terms of a G.P. is nine times the sum of the first ...

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  8. Find the sum of the all the three digit numbers, which leave the remai...

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  9. Let S(n) be the sum of first n terms of and A.P. If S(3n)=5S(n), then ...

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  10. If positive integers a(1),a(2),a(3),..... are in A.P. such that a(8...

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  11. A man accepts a position with an initial salary of Rs. 5200 per mon...

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  12. the income of a person is Rs. 300,000 in the first year and he rece...

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  13. A person buys every year National Saving Certificates of value exceedi...

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  14. A manufacturer of T.V. serts produced 600 units in the third year and ...

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  15. In a state, all the school teachers decided to help those underprivele...

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  16. Find the indicated terms in the following: a=1,r=1.2,t(4),t(n)

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  17. Find the 10 th term of the geometric series: 5+25+125+…………. Also f...

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

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  19. In a finite G.P. the product of the terms equidistant from the begi...

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  20. Prove that the product of first n terms of a G.P. whose first term is ...

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