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find the open intervals where f(x) = x √ 4 − x 2 is increasing or...

find the open intervals where f(x) = x √ 4 − x 2 is increasing or decreasing algebraically

find the open intervals where f(x) = −x 3 + 4x 2 − 6 is concave upward or concave downward algebraically


the radical goes overvthe whoe equation over 4-x^2
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