<img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=539359806247306&ev=PageView&noscript=1"/>

Question

This question was asked in Example 3
Akash Soni's image

The vertices of aparallelogram ABCD are A(3,-4,7), B(5,3,-2)and C(1,2,-3). Find the fourth vertex D which is opposite to B.