CÂU 2. CHO HÀM SỐ F X 3COS 26 XSIN 24 XCOS 4XM.

1)

Khi

m



0

thì

^{f x}

 

^{ }

⁰

^{3cos 2}

⁶

^x

^

^{cos 2}

⁴

^x

^{ }

⁰

^{cos 2}

⁴

^x



^{3cos 2}

²

^x

^{ }

¹



⁰













x

x

k

x

k

k

Z

cos 2

0







 



 

  

