Question: Delete Implement of a Vector

<p>Delete Implement of a Vector</p>
<p>example I have a vector </p>
<p>A:=<1,2,3,4,5>;</p>
<p>How to operate to give a vector have form</p>
<p>A:=<1,2,3,4>; or A:=<1,2,3>;</p>
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