Homework Statement
True/False:
The set of vectors B={(-1,-1,1,1),(1,0,0,0),(0,1,0,0),(-1,-1,1,-1)} is an orthonormal basis for Euclidean 4-space \mathbb{R}^4.
Homework Equations
NoneThe Attempt at a Solution
I said false because \langle (-1,-1,1,1),(-1,-1,1,1) \rangle =2\ne1, which shows...