SOLUTION: how to find the sum of 50+51+52+...+83+84
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Question 987851: how to find the sum of 50+51+52+...+83+84
Answer by ikleyn(52905) (Show Source): You can put this solution on YOUR website!
.
It is an arithmetic progression with the first term = 50, the common difference 1 and the number of terms is (84-49) = 35.
Apply the formula for the sum of first n terms of an arithmetic progression
(see, for example, the lesson Arithmetic progressions in this site).
S = = = 67*35 = 2345.
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