Question

Am progresia bn cu n>=1, de ratie q. Daca b1=1/4 si q =4, sa se calculeze b10​

Answer 1

$\displaystyle b_1=\frac{1}{4} , ~q=4,~b_{10}=?\\\\ b_n=b_1 \cdot q^{n-1}\\\\ b_{10}=\frac{1}{4} \cdot 4^{10-1}=4^{-1}\cdot 4^{9}=4^{-1+9}=4^{8}=65536$