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If S1,S2 and S3 are respectively the sum...

If `S_1,S_2` and `S_3` are respectively the sums of n, 2n and 3n terms of an A.P, whose first term is a and common difference d, then find `S_1,S_2` and `S_3`

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`S_1=n/2[2a+(n-1)d],S_2=n[2a+(2n-1)d],S_3=(3n)/2[2a+(3n-1)d]]
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A N EXCEL PUBLICATION-SEQUENCES AND SERIES-QUESTION BANK
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  2. Consider the equation 1+6+11 + 16 + ... +x= 148 Solve the given equati...

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  3. If S1,S2 and S3 are respectively the sums of n, 2n and 3n terms of an ...

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  4. If S1,S2 and S3 are respectively the sums of n, 2n and 3n terms of an ...

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  8. Insert 6 arithmetic means between 3 and 24.

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  9. Suppose that a, b, c are in A.P. Prove that 2b = a + c

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  10. Suppose that a, b, c are in A.P. Prove that a^2(b+c),b^2(c+a),c^2(a+b)...

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