Question: Consider the function f(x)=9(sinx+cosx)with domain x(0,). Find the interval over which the function is concave up. f(x)is concave up over the interval( , )

Consider the function f(x)=9(sinx+cosx)with domain x(0,). Find the interval over which the function is concave up.

f(x)is concave up over the interval( , )

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