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  1. <?php
  2. function compute($a, $d, $n, $s) {
  3. $nth = $a + ($n - 1) * $d;
  4. $sum = ($s / 2) * (2 * $a + ($s - 1) * $d);
  5. return $nth + $sum;
  6. }
  7. echo compute(3, 2, 50, 20);
  8. ?>
Success #stdin #stdout 0.01s 20568KB
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https://ideone.com/C3YEs6
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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