danphong2003
danphong2003
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danphong2003Lv1
22 May 2022
Answer:( cos x+ sin x )(cos x - sin x) + 1 = 2 cos^2(x) <=> cos^2(x) - s...
danphong2003Lv1
22 May 2022
Đáp án:f (x) = x ln (x) (uv)' = u'v + uv' => f'(x) = [xln(x)]' = ln(x) +1