Find the sum of first 12 natural numbers each of which is a multiple of 7.

First 12 natural numbers that are a multiple of 7 are, 7, 14, 21, ..........., 12 th term. The above sequence is an A.P. with a = 7 and common difference = 7. Hence, sum of first 12 natural numbers that are divisible by 7 is 546.

Find the sum of 28 terms of an A.P. whose n^th term is 8n - 5.

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Find the sum of all odd natural numbers less than 50.

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Find the sum of first 51 terms of an A.P. whose 2^nd and 3^rd terms are 14 and 18 respectively.

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The sum of first 7 terms of an A.P. is 49 and that of first 17 terms of it is 289. Find the sum of first n terms.

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Mathematics

Find the sum of first 12 natural numbers each of which is a multiple of 7.

AP

Related Questions

Find the sum of 28 terms of an A.P. whose n^th term is 8n - 5.

Find the sum of all odd natural numbers less than 50.

Find the sum of first 51 terms of an A.P. whose 2^nd and 3^rd terms are 14 and 18 respectively.

The sum of first 7 terms of an A.P. is 49 and that of first 17 terms of it is 289. Find the sum of first n terms.

Mathematics

Find the sum of first 12 natural numbers each of which is a multiple of 7.

AP

Related Questions

Find the sum of 28 terms of an A.P. whose nth term is 8n - 5.

Find the sum of all odd natural numbers less than 50.

Find the sum of first 51 terms of an A.P. whose 2nd and 3rd terms are 14 and 18 respectively.

The sum of first 7 terms of an A.P. is 49 and that of first 17 terms of it is 289. Find the sum of first n terms.

Find the sum of 28 terms of an A.P. whose n^th term is 8n - 5.

Find the sum of first 51 terms of an A.P. whose 2^nd and 3^rd terms are 14 and 18 respectively.