The first and second terms of an arithmetic sequence are 50 and 100, respectively.

Question

The first and second terms of a geometric sequence are also 50 and 100,
respectively. The sum of the third terms of these two sequences is:

Answer 1

for the AP, a = 50 d = 50
term3 = 150

for the GP, a = 50, r = 2
term3 = 200

sum of those two terms = 150+200 = 350