If log 2, log (2x -1) and log (2x + 3) are in A.P, then x is equal to ___
5/2
log25
log32
3/2
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1
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What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
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2
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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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3
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What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
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4
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
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5
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What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?
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6
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What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?
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7
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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8
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The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
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9
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For A.P. T18 - T8 = ........ ?
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10
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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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