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Answered on 29/11/2016 Learn Sequences and Series +2 Mathematics

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Find the four arithmetic means between 16 and 91?

Tapas Bhattacharya

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Here, the arithmetic means are p, q, r, and s. So, 16, p, q, r, s, 91, ..... are in A. P. in which t1 = 16, and t6 = 91. Solving , we can get, a = 16, d = 15. so, p = 16 + 15 = 31, q = 31+15 = 46, r = 46 + 15 = 61, s = 61 + 15 = 76. So, the arithmetic means are: 31, 46, 61, 76.
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Answered on 29/11/2016 Learn Sequences and Series +2 Mathematics

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Find the 14th term of the sequence a1 = 3, d = 7?

Tapas Bhattacharya

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For an arithmetic sequence: tn = a + (n-1)d = 3 + (14-1)7 = 3 + 13x7 = 94.
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Answered on 03/12/2016 Learn Sequences and Series +2 Mathematics

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What is the formula for finding the sum of nth term?

Sarvajeet Kumar

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Sn=(n/2)(2a+(n-1)d).
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Answered on 23/11/2016 Learn Sequences and Series +2 Mathematics

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Find the sum of each arithmetic series: 6 + 13 + 20 + 27 +...... + 97?

Sarvajeet Kumar

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Rs. 721.
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Answered on 03/12/2016 Learn Sequences and Series +2 Mathematics

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Find the sum of series: 18 + 22 + 26 + 30 +..... + 50?

Sarvajeet Kumar

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Answered on 03/12/2016 Learn Sequences and Series +2 Mathematics

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What is the formula for arithmetic mean in sequence and series?

Sarvajeet Kumar

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a, b, c are in A. P. b=(a+c)/2.
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Answered on 19/11/2016 Learn Sequences and Series +2 Mathematics

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Find the 8th term of a geometric sequence for which a = -3 and r = -2?

Richa Kumari

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Answered on 29/11/2016 Learn Sequences and Series +2 Mathematics

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Find the next two terms of each geometric sequence: 20, 30, 45, ....?

Tapas Bhattacharya

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Here, a = 20 and r = 30/20 = 45/30 = 3/2 = 1.5. So, next two terms are, 45 x 1.5 = 67.5 and 67.5 x 1.5 = 101.25.
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Asked on 05/11/2016 Learn Sequences and Series +2 Mathematics

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Is the sequence 4, 5, 7, 10, 14,.... is arithmetic or not?

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Asked on 05/11/2016 Learn Sequences and Series +2 Mathematics

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Find the three arithmetic means between 44 and 92?

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