I am trying to work out the range of f(x) = x + 1/x, after sketching it, i notice i can use calculus to find the turning points
and establish it that way:
But are there methods i can use that do not involve calculus? I am working with my son who hasn't met Calculus so i am trying to establish alternative approaches. I thought about guessing values and trying either side but that feels like you already know what the answer is? Unless someone can convince me this method is ok to do.
and establish it that way:
But are there methods i can use that do not involve calculus? I am working with my son who hasn't met Calculus so i am trying to establish alternative approaches. I thought about guessing values and trying either side but that feels like you already know what the answer is? Unless someone can convince me this method is ok to do.