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It can be shown that a function f with continuous second derivative, is convex Use the above fact…

It can be shown that a function f with continuous second derivative, is convex It can be shown that a function f with continuous second derivative, is convex Use the above fact...

Use the above fact to show that  It can be shown that a function f with continuous second derivative, is convex Use the above fact...

 (b) Use part (a) to prove that It can be shown that a function f with continuous second derivative, is convex Use the above fact...

(c) Prove that Var(X)= 0 if and only if X is degenerate at a constant c