Which of the following is Cauchy Schwarz Inequality?
1
\(\rm \left(\Sigma_{i=1}^n a_i^2\right)\rm \left(\Sigma_{i=1}^n b_i^2\right)\ge\rm \left(\Sigma_{i=1}^n a_ib_i\right)^2 \)
2
\(\rm a_1^2+a_2^2+....a_n^2\ge\frac{1}{n} \)
3
\(\rm \frac{a_1^2}{b_1}+\frac{a_2^2}{b_2}+.....+\frac{a_n^2}{b_n^2}\ge\frac{(a_1+a_2+....a+a_n)^2}{b_1+b_2....+b_n} \)
4
None of the above