Question

qual a razao da pg em que a1=4 e a6=128

Answer 1

$a_1=4 \ e \ a_6=128\\\\ a_n=a_1.q^{n-1}\\\\ a_6=a_1.q^{6-1}\\\\ 128=4.q^{5}\\\\ 4.q^5=128\\\\ q^5=\frac{128}{4}\\\\ q^5=32\\\\ q^5=2^5\\\\ q=2$