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# Consider the function f(x)=2sin(x)−((√2)/(2)) times x^2 This function has two inflection numbers AA= and B= For each of the following intervals, tell whether f(x) is concave up (type in CU) or concav

Consider the function f(x)=2sin(x)−((√2)/(2)) times x^2 This function has two inflection numbers A

A=

and B=

For each of the following intervals, tell whether f(x) is concave up (type in CU) or concave down (type in CD).

[0,A)

(A,B)

(B,2π]