A manufacturer of TV sets produced 600 sets in the third year and 700 – InterviewSolution

InterviewSolution

1.	A manufacturer of TV sets produced 600 sets in the third year and 700 sets in the seventh year. Assuming that the production increases uniformly by a fixed number every year, find :(i) the production in the 1st year(ii) the production in the 10th year(iii) the total production in first 7 years
Answer» `a_3=600` a+2d=600-(1) `a_7=700` a+6d=700-(2) subtracting equation 2 from 1 4d=100 d=25 putting this value in 1 a=550 `a_10`=a+9d =550+9(25) =775 `S_n=n/2(a+l)` =7/2(550+770) =4375

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