This commit is contained in:
Izabela Kosmala 2017-11-23 12:48:50 +01:00
parent 1cfe6bc09a
commit 280e3a677c

38
zajęcia 7/komendy.txt Normal file
View File

@ -0,0 +1,38 @@
Na początku określamy zmienną jako x:
x=var('x')
1.
a)
solve(x^6-9*x^5+10*x^4+18*x^3+49*x^2+135*x+84==0,x)
b)
show(solve(x^3-5*x^2+8*x-40 == 0,x))
c)
show(find_root(cos(x)==x,0,pi))
2.
a)
integral(x*sin(x),x)
b)
integral(e^(1/x^2),x,-2,4)
c)
show(diff((sqrt(x^2*sin(x)+2)),x))
d)
show(diff((x*e^(cos(x)))^3,x))
e)
x,y=var('x,y')
f=x^2+sin(x*y)-y
f.diff(y)
3.
x=var('x')
u=var('u')
u=function('u')(x)
RR=(diff(u,x,2)-x*diff(u,x)+u)==0
show(desolve(RR, u, contrib_ode=True,show_method=True))
4.
A=matrix([[1, -4, 7],[14,6,8],[-4,-1,2]])
B=matrix([[2,3,9],[-1,17,6],[0,5,-7]])
show(A*B)
show(A.determinant())
show(B^(-1))