If the common difference of an A.P. is 3 then find the difference between 20th term and 15th term?
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d=3
a+(n-1)d
20 terms=a+19*3
20= a+57
a=-37 term
15 term = -37+(14*3)
-37+42
=5
a+(n-1)d
20 terms=a+19*3
20= a+57
a=-37 term
15 term = -37+(14*3)
-37+42
=5
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