<PRE><B>Question 1122535</B>
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Let u and v be non-zero vectors in R^3 in standard position. Prove that if u and v are of length rcm each, 
where r is an element of R and r is less than 0, then their tips lie on the surface of a sphere of radius rcm.
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&lt;U&gt;For your info&lt;/U&gt; :


&lt;H3&gt;The length &amp;nbsp;&quot;r&quot; &amp;nbsp;of vectors &amp;nbsp;&lt;U&gt;CAN NOT&lt;/U&gt;&amp;nbsp; be less than &amp;nbsp;0.&lt;/H3&gt;


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