Determine the difference
between 10th and 25th terms of
the following Arithmetic
Progression.
-31, -27,-23,...
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Answer:
a+9d = 10th term
a+24d = 25th term
Thus, a+24d-a-9d = 15d = 15×4= 60
Because d = -27-(-31) = 31-27 = 4
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