a+ 34d = 1238
a+69d = 1483
35d = 245
d = 7
then in the 1st equation:
a + 238 = 1238
a = 1000
so term(105) = 1000 + 104(7) = 1728
ar^2 = 99
ar^4 = 891
divide the 2nd by the third.
r^2 = 9
r = ±3
in the 1st
a(9) = 99
a = 11
= 11(3)^6 = 8019
Thanks a lot
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