Q.1.150 workers were engaged to finish a piece of work in a certain number of days.Four workers dropped the second day,four more workers dropped the second day and so on.It takes 8 more days to finish the work now.Find the number of days in which the work was completed.Q.2.Show that the sum of n terms of a G.P. of common difference r beginning with the pth term is rp-q times the sum of an equal number of terms of the same sries beginning with qth term.

Vinay Arya , 14 Years ago

Grade 12