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NEKG33 Mathematical methods for economists
Chapter 2
Powers with rational exponents
Square root
Cube root
Nth root
Powers with rational and real exponent
General powers: Problems
Problem: Square roots
Problem: Square roots
Problem: Square roots and equations
Problem: n’th roots
Problem: Power rules with rational exponents
Problem: Rationalize denominator
Problem: Power functions
Problem: Proving fraction rules
Problem: Fractions, true or false
Inequalities and sign diagrams
Inequalities, Terminology
Sign diagram
Double Inequalities
Absolute Values
Intervals
Inequalities: Problems
Problem: Inequalities
Problem: Solving inequalities
Problem: Sign of expression
Problem: solving inequalities using sign diagrams
Problem: Solving inequalities
Problem: Solving inequalities
Problem: Solving inequalities
Problem: Absolute value
Problem: Absolute value
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Chapter 2
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Sign diagram
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Summary
Factor your expression
Make a sign diagram for each factor
Use the sign rules.