Find the sum of the following arithmetic progressions:

1, 3, 5, 7, … to 12 terms

for the given AP the first term a is 1, and common difference d is a difference of the second term and first term, which is 3 - 1 = 2

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 × 24


s = 144


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