Toán Lớp 11: tìm m để pt sau có nghiệm
2cosx + cosx/2 = m
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Toán Lớp 11: tìm m để pt sau có nghiệm
2cosx + cosx/2 = m
Comments ( 2 )
\cos x + \cos \frac{x}{2} = m\\
{2^2} + {1^2} \ge ,{m^2}\\
m \le 5\\
– \sqrt 5 \le m \le \sqrt 5
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