From 5b05216d484f6d78a47e2d51a028f87d2770ffe4 Mon Sep 17 00:00:00 2001
From: Grzegorz Adamski <grzada@st.amu.edu.pl>
Date: Thu, 11 Jan 2018 11:56:00 +0000
Subject: [PATCH] Dodaj '12/octave.txt'

---
 12/octave.txt | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 12/octave.txt

diff --git a/12/octave.txt b/12/octave.txt
new file mode 100644
index 0000000..0a340d9
--- /dev/null
+++ b/12/octave.txt
@@ -0,0 +1,19 @@
+#zad1
+A=[2,-2,1,-1;-1,4,-5,3;1,1,-1,1;-4,2,1,-2];
+b=[7;1;4;6];
+A\b
+#zad2
+syms x
+solve(x^3-21*x+20==0,x)
+#zad3
+x=-2.0:0.05:2;
+y=-2.0:0.05:2;
+plot(x,x.^2-2*x+3);
+plot(x,cos(2*x),"+k");
+plot(x,sin(1./x),"*b");
+grid on
+x=-2:0.1:2;
+y=-2:0.1:2;
+[xx,yy]=meshgrid(x,y);
+mesh(xx, yy, xx.^2+yy.^2)
+mesh(xx, yy, xx.^2-yy.^2 + 2*x.*y.^2+1)