修改40550答案

题库0.3/Problems.json

@@ -767658,13 +767658,14 @@
             "第三单元"
         ],
         "genre": "解答题",
-        "ans": "(1)$-\\dfrac 12$\\\\\n(2)\\\\\n(3)$\\{x|x=k\\pi+2\\arcsin{\\dfrac 16}$或$x=k\\pi-\\dfrac{\\pi}3,k \\in \\mathbb{Z}\\}$",
+        "ans": "(1) $-\\dfrac 12$;\\\\\n(2) $f(x)=\\begin{cases}-\\sin \\dfrac{x}{2}, & x\\in [-\\dfrac{5\\pi}{2},-\\dfrac{\\pi}{2}),\\\\ \\cos\\dfrac{x}{2}, & x\\in [-\\dfrac{\\pi}{2},\\dfrac{\\pi}{2});\\end{cases}$\\\\\n(3) $\\{x|x=k\\pi+2\\arcsin{\\dfrac 16}$或$x=k\\pi-\\dfrac{\\pi}3,k \\in \\mathbb{Z}\\}$",
         "solution": "",
         "duration": -1,
         "usages": [],
         "origin": "2025届高一下学期周末卷08",
         "edit": [
-            "20230403\t王伟叶"
+            "20230403\t王伟叶",
+            "20240402\t王伟叶"
         ],
         "same": [],
         "related": [],