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3. let pn be the statement that 132333nn122 for the positive...

# Question: let pn be the statement that 132333nn122 for the positive...

###### Question details

Let P(n) be the statement that 1^3+2^3+3^3+.....)=((n(n+1))^2/2) for the positive integer n. Prove that P(n) is true for n>= 1.