Hàm số y = sinx có đạo hàm cấp 100 là:A. y(100) = sinx. B. y(100) = cosx. C. y(100) = -sinx. D. y(100) = -cosx.
Giá trị của a, b sao cho phương trình sau nghiệm đúng với mọi x: làA. a = 1 và l b l < 2. B. l a l > 2 và b = 1. C. a = 1 và l b l > 2. D. l a l < 2 và b = 1.
Đạo hàm của y=1-2x2 làA. y'=121-2x2. B. y'=-4x1-2x2. C. y'=-2x1-2x2. D. Một kết quả khác.
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