kamrankr · August 29, 2015 14:17
diff --git a/polynomial_derivative.php b/polynomial_derivative.php
 <?php 	  
 	  $polynomial = array (1,1,0,1); // x^3+x+1
 	  $derivative = array();	
 		for ($i = 1 ; $i < count($polynomial); $i++ )
 		{
 			 $derivate = $i * $polynomial[$i];
 			 $index = $i - 1;
 			 if ( $index > -1 )
 			 {
 				 $derivative[$index] = $derivate;
 			 }
 		}
 echo '<pre>';		
 print_r($derivative);
	<?php
	$polynomial = array (1,1,0,1); // x^3+x+1
	$derivative = array();
	for ($i = 1 ; $i < count($polynomial); $i++ )
	{
	$derivate = $i * $polynomial[$i];
	$index = $i - 1;
	if ( $index > -1 )
	{
	$derivative[$index] = $derivate;
	}
	}
	echo '<pre>';
	print_r($derivative);