The first and last term of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be
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For an A.P the sum of first 30 terms is -1155,the common difference is -3and the thirtieth term is -82. What is the first term?
How many terms of AP 54, 51, 48… are required to give a sum of 513?
If the sum of n terms of an AP is 3n2+5n then which of its terms is 164?
What is the sum of the first 25 terms of the A.P -10,-7,-4,…….?
The sum of the first n terms of an A.P. is 2235.The first term is 2 and the common difference is 5. What is n = ?
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124 videos|457 docs|77 tests
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