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The Maxima on-line user's manual

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Abs

Function: abs (<expr>) Returns the absolute value <expr>. If <expr> is complex, returns the complex modulus of <expr>.

I(i):=-i/(s*R*C);
eq1: Vhp=Vin+Vlp-d*(tilt*Vbp1-0.5*Vbp2+(1/tilt)*Vbp3);
eq2: Vbp1=I(Vhp);
eq3: Vbp2=I(Vbp1);
eq4: Vbp3=I(Vbp2);
eq5: Vlp=I(Vbp3);
eq6: linsolve([eq1,eq2,eq3,eq4,eq5],[Vhp,Vbp1,Vbp2,Vbp3,Vlp]);
eq7: (eq6),s=%i*2*%pi*f,R=100000,C=100e-12,d=1,Vin=1.0,tilt=0.667;
db(v):=20*log(abs(v))/log(10);
plot2d([db(rhs(eq7[1])),db(rhs(eq7[2])),db(rhs(eq7[3])),db(rhs(eq7[4])),db(rhs(eq7[5]))],[f,8000,80000],[logx]);

There are also some inexact matches for abs. Try ?? abs to see them.

(%o1)                                true
(%i2) 

Related Examples

abs-define-diff-expand-find_root-float-realroots

define(f(x), (x^4+3*x...

define(g(x), abs(4*x/...

f(5.5);

Calculate

abs-log

log(abs(%e^((43*x)/20...

Calculate

abs-linsolve

j:%i;

z1:j*w*l;

z2:1/(j*w*c);

Calculate

abs-plot2d-sin
plot2d(sin(abs(x)),[x,-5,5]);

plot2d(sin(abs(x)),[x...

plot2d(-sin(abs(x)),[...

Calculate

abs

f(x):=x/(abs(x)^(1-a));

f((x^b)*abs(x));

Calculate

abs-define-find_root-plot2d
plot2d(h(x), [x, -5, 5], [y, 35, 45]);

define(h(x), abs(2*x^...

h(3);

plot2d(h(x), [x, -5, ...

Calculate

abs-exp-float-plot2d
plot2d([abs(H8k(f))],[f,0,500]);

H(a1,a2,b0,b1,b2,z):=...

H8k(f):=H(-1.97778648...

H16k(f):=H(-1.9888929...

Calculate

abs-assume-ev-false-forget-simp-true

simp:false;

assume(x>0);

ev(abs(x)-x,simp);

Calculate

abs-float-numer-sin-subst-taylor

f:taylor(sin(%pi/6+x)...

f1:subst(x=%pi/6+x+%p...

v=float(f1),numer;

Calculate

abs-expand-ratsimp-rootscontract

prnt: "Your CGS expre...

expr: curl*B - (1/c)*...

/* Put your ...

Calculate