Given set S = { [(-1)^x]/x : x is element of natural numbers} a.) Show that set S is bounded above and below. Find the supremum and infimum b.) Are the extrema found in S?

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A: f(x)=4x3+6x2-6x-4f'(x)=12x2+12x-6f'(x)=012x2+12x-6=02x2+2x-1=0 x=-2±4-4(2)(-1)2x=-1±32     (critical…

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Q: If ø + SCR is bounded above, then .S has a supremum إختر واحداً: ibs

A: I have proved by contradiction

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