Question

Find the first term of the G.P. whose common ratio 5 and whose sum to first 6 terms is 46872

Please send with clear steps
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Answer 1

Answer:

12

Step-by-step explanation:

Sn = $\frac{a(r^{n} -1)}{r-1}$

46872 = $\frac{a(5^{6} -1)}{5-1}$

46872 x (5-1) = a($5^{6}$ -1)

$\frac{187488}{15624}$=a

a = 12