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Homework Statement
Prove
a)5 < 51/2 + 51/3 + 51/4
b) n > n1/2 + n1/3 + n1/4 for all ints n>8
Homework Equations
The Attempt at a Solution
i tried the AM GM inequality
and found
51/2 + 51/3 + 51/4 > 3(513/36)
what further can i do?
can anyone please help me out??