diff --git a/姚安欣/fun1.m b/姚安欣/fun1.m
new file mode 100644
index 0000000..459556a
--- /dev/null
+++ b/姚安欣/fun1.m
@@ -0,0 +1,3 @@
+function f=fun1(x)
+    f=x(1)*x(1)+x(2)*x(2)-x(1)*x(2)-2*x(1)-5*x(2);
+end