Critical Thinking / Discussion / Writing
111. f has a relative maximum (minimum) at x=a if there is an interval [a,x1) with a<x1<b such that f(a)≥f(x) ( f(a)≤f(x)) for every x in the interval.
113.
f(x)=x on the interval [−1, 1]
f(x)={x0if 0≤x<1if x=1
f(x)={x1if 0<x≤1if x=0
f(x)=⎧⎩⎨⎪⎪01−1if x=0 or x=1if 0<x<1 and x is rationalif 0<x<1 and x is irrational
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