$x + y$ \ python x=12 test ```python for i in range(3): print(str(i)) ``````python x = 12 for i in range(3): print(i) ```**The Cauchy-Schwarz Inequality** $$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$ The Cauchy-Schwarz Inequality $$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$for i in range(3): print(str(i)) def index puts "hello world" end
