The function f x 20 x is weakly concave and weakly convex over R Solution True

The function f x 20 x is weakly concave and weakly

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2. The functionf(x)=20+xis weakly concave and weakly convex overR. 3. Letfbe a continuous function over the domainDR. IfDis not compact, a maximummay not necessarily exist. 4. Iff(x)is a homogeneous function of degreekandg(x)is a homogeneous function ofdegreesthenh(x)=f(x)
g(x)is a homogeneous function.
5. The functionf(x)=
x
is not dierentiable atx=
0. 2
0
0
6. IfXandYare both open sets thenXYis an open set. 7. LetPandQbe atomic propositions. The propositional form[(PQ)P]Pis atautology.

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