From 9ec478e5e40a4ffa3f287c30c63b570238bc61b7 Mon Sep 17 00:00:00 2001
From: Grzegorz Adamski <grzada@st.amu.edu.pl>
Date: Thu, 23 Nov 2017 11:47:01 +0000
Subject: [PATCH] 07.txt

---
 07 | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 07

diff --git a/07 b/07
new file mode 100644
index 0000000..b9dc2c4
--- /dev/null
+++ b/07
@@ -0,0 +1,19 @@
+solve(x^6-9*x^5+10*x^4+18*x^3+49*x^2+135*x+84 == 0, x )
+solve(x^3-5*x^2+8*x-40 == 0,x)
+find_root(cos(x)==x, 0, pi/2)
+integral(x*sin(x),x)
+integral(e^(1/x^2),x,-2,4)
+diff(sqrt(x^2*sin(x)+2),x)
+diff((x*e^(cos(x)))^3,x)
+x,y=var('x,y')
+f=x^2+sin(x*y)-y
+f.diff(y)
+x=var('x')
+u=function('u')(x)
+rr=diff(u,x,2)-x*diff(u,x)+u
+desolve(rr,[u,x],contrib_ode=True)
+A=matrix([[1,-4, 7],[14, 6,  8],[-4, -1, 2]])
+B=matrix([[2, 3, 9],[-1, 17, 6],[ 0, 5, -7]])
+A*B
+det(A)
+B^-1
\ No newline at end of file