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anonymous
 5 years ago
Find the intervals where the function, f(x)= xcosx ; (0, 2pie), is increasing and decreasing.
anonymous
 5 years ago
Find the intervals where the function, f(x)= xcosx ; (0, 2pie), is increasing and decreasing.

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0take derivative of f(x) f'(x) = 1+sin(x) function is increasing when f'(x)>0 > sin(x)>1 function is decreasing when f'(x)<0 > sin(x)<1 Note that the sin function is always greater than or equal to 1 so f(x) is always increasing
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