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Example
The first, fifth and seventh terms of an A.P corresponds to the first three consecutive terms of a decreasing G.P. The first term of each progression is 64, the common difference of the AP is d and the common ratio of the G.P is r
(a) (i) write two equations involving d and r.
ii).Find the values of d and r.
b).Find the sum of the first 10 terms of:
i).The arithmetic progression (A.P).
ii).The Geometric progression (G.P).