Asked by Adesanya
The fourth term of a GP is 6 and the seventh term is -48,calculate (a)common ratio (b)first term(c)sum of the first eleven terms
Answers
Answered by
Steve
-48/6 = r^3
Now you can figure a, and then
S11 = a(r^11-1)/(r-1)
Now you can figure a, and then
S11 = a(r^11-1)/(r-1)
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