SOLUTION: is sqrtx^2 an identity (true for all values of x?)

Algebra ->  College  -> Linear Algebra -> SOLUTION: is sqrtx^2 an identity (true for all values of x?)      Log On


   

Question 73042: is sqrtx^2 an identity (true for all values of x?)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
You haven't set sqrt%28x%5E2%29 equal to anything, so I would say it's not an identity. All identities are in a sense equalities that are true for every value of x. For instance %28sin%28x%29%29%5E2%2B%28cos%28x%29%29%5E2=1 for every real number (any number can work) which makes this an identity.