Objectives
To add, subtract, multiply, and divide functions
To find the composite of two functions
The final cost of the sofa in the Solve It involves two functions: one that gives an additional discount and one that multiplies to find the sales tax.
Essential Understanding You can add, subtract, multiply, and divide functions based on how you perform these operations for real numbers. One difference, however, is that you must consider the domain of each function.
Addition |
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Subtraction |
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Multiplication |
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Division |
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The domains of the sum, difference, product, and quotient functions consist of the x-values that are in the domains of both f and g. Also, the domain of the quotient function does not contain any x-value for which g(x) = 0.