The first term of A.P is 3.5, the common difference is d if the difference of 20^th and 6^th terms is 40. (a) (i)find the common...

The first term of A.P is 3.5, the common difference is d if the difference of 20^th and 6^th terms is 40.
(a) (i)find the common difference, d
(ii) calculate the sum of the first 40 terms of the AP
(b) The progression is such that the 2^nd , 14^th and 85^th terms of the AP forms the first 3 terms of a G.P. If the common difference of A.P is 2.5
Find
(i) 2^nd term of the G.P
(ii) Sum of the two 10 terms of G.P

Answers

Kavungya answered the question on November 12, 2019 at 13:16

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