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Which function families have maximums and minimums? 1.)linear absolute value functions and exponential functions 2.) linear absolute value functions and quadratic functions 3.) linear absolute value functions and linear functions 4.) linear absolute value functions and constant functions

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b