Exercise use the following definition: If f: R ? R is a function and c is a nonzero real number, the function (c • f): R ? R is defined by the formula (c • f)(x) = c • f(x) for all real numbers x.ExerciseLet f: R ? R be a function and c a nonzero real number. If f is one-to-one, is c • f also one-to-one? Justify your answer.

CHAPTER 2: CELL THEORY Wednesday September 7 Macromolecules: Many of life's molecules are gigantic >Carbohydrates: dietary energy, plant structure >Lipids: long term energy storage (fat) and hormones (steroids) >Proteins: enzymes, structure, storage >Nucleic Acid: information storage Cell Theory: 1. All organisms are composed of...