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  1. <?php
  2.  
  3. var_dump(pow(pow(9, 1/2), 2)); // 9, как и должно быть
  4.  
  5. $root = pow(9, 1/3); // 2.0800838230519
  6. var_dump(pow(2.0800838230519, 3)); // 8.(9)
  7. var_dump(pow($root, 3) == 9); // true, 8.(9) == 9
  8.  
Success #stdin #stdout 0.02s 52432KB
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Standard input is empty
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float(9)
float(8.9999999999999)
bool(true)
https://ideone.com/I6onbw
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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