Q1 of 167 Page 19

Find the sum of the following arithmetic progressions:

41, 36, 31, … to 12 terms

for the given AP the first term a is 41, and common difference d is a difference of the second term and first term, which is 36 - 41 = - 5

To find: the sum of given AP


The formula for sum of AP is given by



Substituting the values in the above formula



s = 6 × 27


s = 162


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