Question

write 3 terms of the G.P when the first term a=4 and common ratio r=3

Answer 1

Given,
a = 4
r = 3

an = ar to the power (n-1)
$an = a {r}^{n - 1} \\ a1 = 4 \times {3}^{1 - 1} = 4 \times 1 = 4 \\ a2 = 4 \times {3}^{2 - 1} = 4 \times 3 = 12\\ a3= 4 \times {3}^{3 - 1} = 4 \times 9 = 36.$



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