Q1 of 167 Page 19

Find the sum of the following arithmetic progressions:

3, , 6, , … to 25 terms

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

To find: the sum of given AP


The formula for sum of AP is given by



Substituting the values in the above formula



s = 25 × 21


s = 525


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