### Related

##### abs-define-find_root-kill-reset

kill(all);

reset();

define(f(x),abs(x^3-5...

Calculate

##### abs-define-find_root-float-realroots

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

float(g(-3.2));

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

Calculate

##### abs-define-find_root-plot2d

abs(-5);

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

h(3);

Calculate

##### abs-define-find_root-kill-plot2d-reset

kill(all);

reset();

define(f(x),abs(x^3-5...

Calculate

##### abs-define-find_root-plot2d

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

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

a1:find_root(h(x)=40,...

Calculate

##### abs-define-find_root-plot2d-realroots

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

h(0);

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

Calculate

##### abs-define-find_root-plot2d

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

h(0);

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

Calculate

##### abs-define-find_root-plot2d-realroots

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

h(0);

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

Calculate

##### abs-define-find_root-float-plot2d-realroots

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

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

f(3.2);

Calculate

##### abs-define-find_root-plot2d

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

h(3);

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

Calculate

### [abs,define,find_root]

Run Example
```(%i1)define(h(x), abs(2*x^5 - 5*x^4 - 3*x^3 -8*x^2 +5*x + 20));
!   5      4      3      2           !
(%o1)           h(x) := !2 x  - 5 x  - 3 x  - 8 x  + 5 x + 20!
(%i2) find_root(h(x)=40, x,0 , 40);
(%o2)                          1.968456875009692
(%i3) ```
Run Example
```define(f(x),(x^4+3*x^3-2*x^2+x-13)/(5*x^3+7*x^2+5));
4      3      2
x  + 3 x  - 2 x  + x - 13
(%o1)                  f(x) := -------------------------
3      2
5 x  + 7 x  + 5
(%i2) define(g(x),abs((4*x)/(%e)));
- 1
(%o2)                       g(x) := 4 %e    abs(x)
(%i3) g(-%e);
(%o3)                                  4
(%i4) find_root(g(x)=3,x,2,2.2);
(%o4)                          2.038711371344284
(%i5) ```
Run Example
```define(g(x), abs(4*x/%e));
- 1
(%o1)                       g(x) := 4 %e    abs(x)
(%i2) s: find_root( g(x)=3,x,1,3);
(%o2)                          2.038711371344284
(%i3) define(f(x),(x^4+3*x^3-2*x^2+x-13)/(5*x^3+7*x^2+5));
4      3      2
x  + 3 x  - 2 x  + x - 13
(%o3)                  f(x) := -------------------------
3      2
5 x  + 7 x  + 5
(%i4) ```

### Related Help

Help for Abs

Help for Define

Help for Find_root