Question

Nessa P.G a4=432 e a1=2. Logo a valor da razão é?

Answer 1

an = 2 x (1/2)n-1
$a_{n}= a_{1} . r^n^-^1\\432 =2.r^4^-^1\\432 =2.r^3\\r^3=\frac{432}{2}\\\\r^3=216\\r= \sqrt[3]{216} \\r=6$