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  1. <?php
  2.  
  3. function f($x) {
  4.   return 1 - pow(2, -$x) / (1 + pow(2, $x));
  5. }
  6.  
  7. $a = 0;
  8. $b = 10;
  9. $dx = 0.1;
  10.  
  11. echo "x\tf(x)\n";
  12.  
  13. $x = $a;
  14. do {
  15.   $y = f($x);
  16.   echo "$x\t$y\n";
  17.   $x += $dx;
  18. } while ($x <= $b);
  19.  
  20. ?>
  21.  
Success #stdin #stdout 0.03s 26068KB
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stdout
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x	f(x)
0	0.5
0.1	0.54964526363101
0.2	0.59484747532311
0.3	0.63594808498366
0.4	0.67326764451402
0.5	0.70710678118655
0.6	0.73774710387919
0.7	0.76545205465742
0.8	0.79046771681403
0.9	0.81302358897772
1	0.83333333333333
1.1	0.85159550441334
1.2	0.86799426337487
1.3	0.88270008121581
1.4	0.8958704330484
1.5	0.90765048437047
1.6	0.91817376927543
1.7	0.92756285973277
1.8	0.935930024455
1.9	0.94337787543735
2	0.95
2.1	0.95588157606134
2.2	0.96109996840161
2.3	0.96572530381584
2.4	0.96982102327848
2.5	0.9734444095257
2.6	0.97664708878326
2.7	0.97947550570871
2.8	0.9819713709594
2.9	0.98417208112971
3	0.98611111111111
3.1	0.98781837920949
3.2	0.98932058560166
3.3	0.99064152492303
3.4	0.99180237395202
3.5	0.99282195549329
3.6	0.99371697966405
3.7	0.99450226385814
3.8	0.99519093270427
3.9	0.99579459935168
4	0.99632352941176
4.1	0.99678678886215
4.2	0.99719237718261
4.3	0.99754734694439
4.4	0.99785791101781
4.5	0.99812953850063
4.6	0.99836704040313
4.7	0.9985746460575
4.8	0.99875607115036
4.9	0.99891457820869
5	0.99905303030303
5.1	0.9991739386679
5.2	0.99927950487759
5.3	0.99937165815815
5.4	0.99945208836177
5.5	0.9995222750791
5.6	0.99958351331825
5.7	0.99963693613588
5.8	0.9996835345659
5.9	0.9997241751555
6	0.99975961538462
6.1	0.99979051721559
6.2	0.99981745899221
6.3	0.99984094588335
6.4	0.99986141904417
6.5	0.99987926364833
6.6	0.99989481592707
6.7	0.9999083693352
6.8	0.99992017995006
6.9	0.99993047119709
7	0.9999394379845
7.1	0.99994725031966
7.2	0.9999540564713
7.3	0.99995998573365
7.4	0.99996515084198
7.5	0.99996965008306
7.6	0.9999735691385
7.7	0.99997698269449
7.8	0.9999799558473
7.9	0.99998254533009
8	0.99998480058366
8.1	0.99998676469079
8.2	0.99998847519144
8.3	0.99998996479388
8.4	0.9999912619949
8.5	0.99999239162085
8.6	0.99999337529923
8.7	0.99999423187008
8.8	0.99999497774447
8.9	0.99999562721711
9	0.99999619273879
9.1	0.99999668515389
9.2	0.99999711390729
9.3	0.99999748722473
9.4	0.99999781227002
9.5	0.99999809528191
9.6	0.99999834169344
9.7	0.99999855623586
9.8	0.99999874302923
9.9	0.99999890566128
10	0.9999990472561
https://ideone.com/8hzw5m
language:
PHP (php 7.3.5)
created:
16 days ago
visibility:
public

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