Sponsored links: Algebra eBooks
 

Related

at-diff-exp

d : diff(exp(-x^2),x,...

h(y) := exp(y^2)*at(d...

for i:-1 thru 1 step ...

Calculate

at-cos-factor-log-matrix-plot2d-rat
plot2d([(log(x-1))^2,3*cos(2*x)+1],[x,-10,10]);

rat(((x^4-x^3-11*x^2+...

rat((2-x)/(x+1))*((3*...

rat(((x^3+2*x^2+4*x+8...

Calculate

at-expand-solve

s : solve ([1*1 + 1*1...

at (1*1 + 1*1 + 1*1 +...

Calculate

at-cos-log-phi-plot3d-sqrt
plot3d(at(log(f),r=1/rI),[rI,1/2,5/2],[phi,-%pi,%pi],[grid,200,100],[mesh_lines_color,false]);

f:2*r/sqrt(((1+r^2)+(...

plot3d(at(log(f),r=1/...

log(8)/log(2);

Calculate

at-diff-sin

at(diff(sin(x), x, 1)...

Calculate

at-factor-rat

rat((x^4-x^3-11*x^2+9...

rat((2-x)/(x+1))*((3*...

rat((x^3+2*x^2+4*x+8)...

Calculate

at-mod-num-numer-rat

rat(0.1234);

rat(0.12345);

mod(num(rat(0.12345))...

Calculate

at-diff-find_root-linsolve-pi-quad_qags-sin-subst

f:a0+a1*s^2+a2*s^4;

cond1:at(f,s=1)=0;

cond2:at(diff(f,s),s=...

Calculate

at-diff-linsolve

f: a0 + a1*s^2 + a2*s^6;

cond1: at(f,s=1)=0;

cond2: at(diff(f,s),s...

Calculate

at

Run Example
(%i1)rat(0.1234);

rat: replaced 0.1234 by 617/5000 = 0.1234
                                     617
(%o1)/R/                             ----
                                     5000
(%i2) rat(0.12345);

rat: replaced 0.12345 by 2469/20000 = 0.12345
                                     2469
(%o2)/R/                             -----
                                     20000
(%i3) rat(0.12345);

rat: replaced 0.12345 by 2469/20000 = 0.12345
                                     2469
(%o3)/R/                             -----
                                     20000
(%i4) mod(12345, 1000)/100000, numer;
(%o4)                               0.00345
(%i5) lastdigits(fnum, lastn):=block([m:10*fnum, ans, n:lastn], /* it doesn't help when lastn is bigger than the total digits in fnum it returns the whole digits in fnum anyway without erroring! and fnum=%pi stuff works only upto 8 digits cause num(rat(fnum)) has somuch only! */ratprint:false, k:rat(fnum), ans:mod(m, (10^-n))/(mod(m, 10)*denom(k)), return(float(ans)));
(%o5) lastdigits(fnum, lastn) := block([m : 10 fnum, ans, n : lastn], 
                                                   - n
                                          mod(m, 10   )
ratprint : false, k : rat(fnum), ans : -------------------, return(float(ans)))
                                       mod(m, 10) denom(k)
(%i6) lastdigits(0.12345, 3);
(%o6)                        2.0251113811259619E-8
(%i7) 
Run Example
f:5*4.57+3;
(%o1)                                25.85
(%i2) at(f,x=4,57);
(%o2)                                25.85
(%i3) df:diff(f,x);
(%o3)                                  0
(%i4) at(df,x=4.57);
(%o4)                                  0
(%i5) plot2d(df,[x,0,1]);
plotplot2d(df,[x,0,1]);
Run Example
rat(+ 0.76895553987651);

rat: replaced 0.76895553987651 by 4513/5869 = 0.76895552905095
                                     4513
(%o1)/R/                             ----
                                     5869
(%i2) 

Related Help

Help for At