Question

This inequality $|a\cdot b|\le \left|a\right|\cdot \left|b\right|$ is called

• A. Cauchy - schwartz inequality
• B. Triangle inequality
• C. Rolle's Theorem
• D. Lagrange's mean value theorem

Answer 1

The correct option is A Cauchy - schwartz inequality

According to Cauchy - Schwartz inequality-

$|a\cdot b|\le \left|a\right|\cdot \left|b\right|$