What is the sum of first n terms of the ...

What is the sum of first n terms of the AP a, 3a, 5a,….

`(2n - 1)a`

2na

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EDUCART PUBLICATION-ARITHMETIC PROGRESSIONS-LONG ANSWER TYPE QUESTIONS

What is the sum of first n terms of the AP a, 3a, 5a,….
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The 26th, 11th and the last terms of an AP are, 0, 3 and -(1)/(5),resp...
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Find the sum of the following series : 5+(-41)+9+(-39)+13+(-37)+17+....
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The sum of four consecutive numbers in A.P. is 32 and the ratio of the...
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Solve for x: 1+4+7+10+...+x=287
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The sum of the first five terms of an A.P. and the sum of the first s...
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Find the (i) sum of those integers between 1 and 500 which are multi...
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Find the (i) sum of those integers between 1 and 500 which are multi...
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Find the (i) sum of those integers between 1 and 500 which are multi...
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An AP consists of 37 terms. The sum of the three middle most terms is ...
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If the sum of first p terms of an A.P. is equal to the sum of the firs...
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Find the sum of the integers between 100 and 200 that are divisible by...
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Find the sum of the integers between 100 and 200 that are divisible by...
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Which term of the Arithmetic Progression -7, - 12, -17, -22,… will be ...
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How many terms of the arithmetic progression 45, 39, 33,….. Must be ta...
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Show that the sum of an AP whose first term is a, the second term b an...
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If the sum of the first four terms of an AP is 40 and the sum of the f...
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The sum of the 4th and 8th terms of an AP is 24 and the sum of the ...
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If the ratio of the 11^(th) term of an AP to its 18^(th) term is 2 : 3...
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The ratio of the sums of m terms and n terms of an A.P. is m^(2) : n^(...
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Solve the equation -4+(-1)+2+ … +x =437.
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