(Section 1.7: Symmetry Revisited) 1.7.9 Example 8 (Applying a Product Rule)Let fx()=7x6±x2+4x3±5x. Isfeven, odd, or neither? § Solution=evenodd=oddSign Rule: PN=N. fis an oddfunction. §Example 9 (Applying Product and Quotient Rules)In Chapter 4, we will see that the sine function (abbreviated “sin” when applied to an argument) is odd, and the cosine function (abbreviated “cos”) is even. Let q±=²cossin. Is qeven, odd, or neither? § SolutionWARNING 4:The “±” sign in front of the fraction is inconsequential in our analysis; multiplication by the constant
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