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Student Support Forum: 'Problem with plugging functions in' topicStudent Support Forum > General > Archives > "Problem with plugging functions in"

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T
01/30/13 4:46pm

I'm just learning mathematica so I'm trying to plug in some simple functions to check DE solutions and this happens.

input: y[x_] := E[x]
input: y'[x] - y[x]
output: -E[x]

Why is the output not zero? Thanks in advance.

Also using student version 8

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Subject (listing for 'Problem with plugging functions in')
Author Date Posted
Problem with plugging functions in T 01/30/13 4:46pm
Re: Problem with plugging functions in Bill Simpson 01/31/13 3:13pm
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