Prove inequality 1 / (2 ^ 2) + 1 / (3 ^ 2) + + 1 / (n ^ 2) Prove inequality 1 / (2 ^ 2) + 1 / (3 ^ 2) + ··· + 1 / (n ^ 2)
1/(2^2)+1/(3^2)+···+1/(n^2)
Prove inequality 1 / 2 * 2 + 3 * 3 / 1 + 1/n*n
1/2*2+3*3/1+…… 1/n*n
Prove inequality 1 / 2.2 + 1 / 3.3.3 +... + 1 / N.N
Scaling method
n*n>n*(n-1)
1/(n*n)