If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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What is the sum of the first 11 terms of an arithmetic progression if the 3rd term is 1 and the 8th term is 19?
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If the sums of n terms of two arithmetic progressions are in the ratio \(\frac{{3n + 5}}{{5n + 7}}\) then their nth terms are in the ration
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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
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The 3rd and 6th term of an arithmetic progression are 13 and 5 respectively. What is the 11th term?
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The 4th and 7th term of an arithmetic progression are 11 and 4 respectively. What is the 15th term?
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Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
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For an A.P. if a25  a20 = 45, then d equals to:
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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