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The sum of the first p , q , r terms of ...

The sum of the first `p , q , r` terms of an A.P. are `a , b , c` respectively. Show that `a/p(q-r)+b/q(r-p)+c/r(p-q)=0`

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Sum of the first p, q and r terms of an A.P are a, b and c, respectively.Prove that a/p(q-r)+b/q(r-p)+c/r(p-q)=0

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  2. In a school students thought of planting trees in and around the sc...

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  3. The sum of the first p , q , r terms of an A.P. are a , b , c respecti...

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  5. If there are (2n+1) terms in A.P. , then prove that the ratio of the s...

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  12. The angles of a quadrilateral are in A.P. whose common difference is 1...

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  14. For what value of n the n^(t h) terms of the following two A.Ps the s...

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  15. How many terms are there in the sequence 3,6,9, 12 ,.......... 111 ?

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  19. Write the sequence with nth terms: (i)an=3+4n (ii) an=5+2n (iii)an=6-...

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