2018-11-20-112709.sagews

point((1,1))
point([(0,2),(-1,-3),(3,1.5)],color='red' ,marker="s",size=25)
f(x)=((2-exp(x))/(1+exp(x)))
tall_eix_abscisses=solve(f(x)==0,x); tall_eix_abscisses
point((x.subs(tall_eix_abscisses),0),marker="o",size=100) + plot(f(x),-3,3)#exemples

[x == log(2)]

f(x)=((x^3)/10)-((x^2)/3)-(1/4)#exercici a
g(x)=sin(pi*x^2)
plot(f(x),-2,2)
plot(g(x),-2,2)
h(x)=f(x)-g(x)
plot(h(x),-2,2)#exercici a

find_root(g(x)==f(x),-2, 2)#exercici b
find_root(g(x)==f(x),-2, 0)
find_root(g(x)==f(x),0, 1.337)
find_root(g(x)==f(x),1.5, 2)
find_root(g(x)==f(x),1.5, 1.91)#exercici b

1.338724861778746 -1.1479327551766951 1.0824700959381763 1.928476443723171 1.928476443723171 1.8081182244881397

dh=diff(h(x))#exercici d
max_symbolic(dh,-2,2)
min(dh,-2,2)#exercici d

max(-2*pi*x*cos(pi*x^2) + 3/10*x^2 - 2/3*x, 2) -2*pi*x*cos(pi*x^2) + 3/10*x^2 - 2/3*x

A=plot(f(x),-2,2)#exercici c
B=plot(g(x),-2,2)
var('l1 l2 l3 l4 l5 l6 l7 l8 l9 l10')
l1==find_root(g(x)==f(x),-2, 2)
l2==find_root(g(x)==f(x),-2, 0)
l3==find_root(g(x)==f(x),0, 1.337)
l4==find_root(g(x)==f(x),1.5, 2)
l5==find_root(g(x)==f(x),1.5, 1.91)
point((l1),(l2),(l3),(l4),(l5), color='red' ,marker="s",size=25)
show(A+B)#exercici c

(l1, l2, l3, l4, l5, l6, l7, l8, l9, l10) l1 == 1.338724861778746 l2 == -1.1479327551766951 l3 == 1.0824700959381763 l4 == 1.928476443723171 l5 == 1.8081182244881397

Error in lines 9-9 Traceback (most recent call last): File "/cocalc/lib/python2.7/site-packages/smc_sagews/sage_server.py", line 1188, in execute flags=compile_flags) in namespace, locals File "", line 1, in <module> TypeError: point() takes exactly 1 argument (8 given)