Find the sum of the following A.P\'s4. 1/15, 1/12,1/10.......to 11 ter

1.	Find the sum of the following A.P\'s4. 1/15, 1/12,1/10.......to 11 terms
Answer» A.P\'s :\xa01/15, 1/12,1/10.......to 11 termsHere a=1/15d=1/12-1/15=5/60-4/60=1/60sum upto11th term S11=11/2(2/15+101/60)=11/2(8/60+10/60)=11/218/60=33/20

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