In an AP (i) given a=5,d=3,an=50, find n and Sn. (ii) given a12=37,d=3, find a and S12. (iii) given d=5,S9=75, find a and a9. (iv) given a=8,an=62,Sn=210, find n and d. (v) given l=28,S=144, and there are total of 9 terms. Find a.
Question 1 (iii) Find the sum of the following APs (iii) 0.6, 1.7, 2.8 ,…….., to 100 terms