Calculus Omens
Stu came to my office hours today to ask questions about the calculus exam that is happening tomorrow.
I led Stu through a max-min calculation. Stu was OK at taking the derivative and setting it equal to zero. But then he had to solve x2 - 3x - 4 = 0. And he was stuck. Could not factor it.
In a later problem, we worked together on factoring it, and we got to (x + 4)2(x - 4) = 0. He couldn't solve for x.
Good luck on that exam tomorrow.
I led Stu through a max-min calculation. Stu was OK at taking the derivative and setting it equal to zero. But then he had to solve x2 - 3x - 4 = 0. And he was stuck. Could not factor it.
In a later problem, we worked together on factoring it, and we got to (x + 4)2(x - 4) = 0. He couldn't solve for x.
Good luck on that exam tomorrow.
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