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已知函数f (x)=sinxcosx-2cos2x+1.(Ⅰ)求f ();(Ⅱ)求函数f ...
试题详情
已知函数f (x)=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABYAAAASCAYAAABfJS4tAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAD8SURBVDhPzVQxEoQgDMy7KHiOPT+h5iG0eYgF
T8kRUEhQGZyxOGcslOyy2SwAvXwAgJbel7yFdOVZqxJMf0KMrvtmA6VJrxfFKZA9fXfYkEC80H4g
OS4SBeMemjjXNyEVe0IhISqFKViCiWpFnJLCohPEl67ZlmXFAj3gLqmQu95ZfZcKxpRsK48lWvl9
P8HHuB1DtKGOXihOFKyjPteXxLlczqcRo7N0bNYZ43bEcOsxmp084XMh5p3UvHIBf8cYC6E3QMbv
tcVHYu5YpKIZry6XwZKivKpWxPJgiQwPHk+OW17aMpBVf35X7N4QGP89MffDqj9XfBq1SvwD9c9b
FOaX6DMAAAAASUVORK5CYII=
)
sinxcosx-2cos
2x+1.
(Ⅰ)求f (
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAjCAYAAAB/wZEbAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAE/SURBVEhL7VbBEcMgDGMydmIdlvEojOJiTKgh
JIBprn20d7nk2kYIWbIx+ODHPIiN3wEP3qIxhi/rMSi2eMEc0CkBJYc+ODh0oKDavNIBD+htlsM4
3FnjtqDgaBGLXiN43MXQLamwSo2G4BiF0RZ3Dvwp5uA+qXnwaI/wxLuSdDLlhCx6v/8yeHSSkLD0
ovidjeHYYg6OExy846BRvURPiosdUV+7y0oUR8WeJDvoFnNegHpR7kEELuy1D56se8hTt4pN8NxB
s86pD+Vn8F4UNDHopJG2ejWRcuDIGazQO4CkDjMvAA04/blomG23EFkhC71cgweAanbKbc/k9hb8
BNC4YbTAEjhNpgVVZELPslTMKv1HnPn3SeYiKHO48+DagTFkTg6pdF440zD4xfTho0V7zZ9lNuN/
X4A/eFefFzOZla9id897AAAAAElFTkSuQmCC
)
);
(Ⅱ)求函数f (x)图象的对称轴方程.
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