# Narrow Escape 1

Algebra Level 4

The value of the infinite product below can be expressed as $$\frac{a}{b}$$ for coprime positive integers $$a$$ and $$b.$$ Find $$a+b$$.

$\prod_{k=2}^{\infty} \frac{(k^2-1.21)}{(k^2-0.81)}$

×