Determine if the described set is a subspace. Assume a, b, and c are real numbers. The subset of R3 consisting of vectors of the
form [a b c] , where at most one of a , b and c is non 0. The set is a subspace.
The set is not a subspace.
If so, give a proof. If not, explain why not.
Remember that <span>an extraneous solution of an equation, is the solution that emerges from solving the equation but is not a valid solution.
Lets solve our equation to find out what is the extraneous solution: </span> and and <span> So, the solutions of our equation are </span> and . Lets replace each solution in our original equation to check if they are valid solutions: - For We can conclude that 7 is a valid solution of the equation.
- For We can conclude that 4 is not a valid solution of the equation; therefore, 4 is a extraneous solution.
We can conclude that the correct answer is: <span>D. the extraneous solution is x = 4</span>