Tính số gia của hàm số $y=x^{2}-4x+1$ tại điểm $x_{0}$ là:

Question

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4 câu trả lời

Answer 1

$\Delta y =2x_{0}-4\Delta x$

Answer 2

$\Delta y =\Delta x(2x_{0}-4\Delta x)$

Answer 3

$\Delta y =2x_{0}+\Delta x$

Answer 4

$\Delta y=\Delta x(\Delta x+2x_{0}-4)$