Key Concepts

base |
independent variable |

better set |
indifferent curves |

boundary point |
intimum |

bounded |
integers |

cardinality |
iniercepl term |

Cartesian product |
interior numbers |

Cobb-Douglas function |
interior point |

closed interval |
intersection |

codomain |
intervals |

compact |
irrational numbers |

complement |
isoquanls |

completeness property |
level set |

composite mapping |
linear function |

concavity |
logarithmic function |

convex combination |
mapping |

convexity |
natural logarithm |

coordinate system |
natural numbers |

dependent variable |
neighborhood |

dimensions |
nonnegative numbers |

disjoint |
one-to-one correspondence |

distance |
ordered pair |

domain |
partition |

exponent |
point sets |

exponential function |
power function |

elements |
power se t |

empty set |
proper subset |

Euclidean distance |
pure number |

function |
quasiconcavily |

image |
quasicorrvexity |

image set |
rational numbers |

implicit function |
range |

rectangular hyperbola slope coefficient real line subset real numbers supremum real-valued functions union relative difference universal set set Venn diagram singleton worse set slope

Review Questions t. How does a Venn diagram help to illustrate the possible relationships between sets and subsets?

2. What is meant by "the real line"?

3. What is a supremum? What is an infimum?

4. What is a point set? What is a convex set?

5. Distinguish between closedness and boundedness of a point set. fi. Distinguish between concavity and convexity of a function.

7. Distinguish between quasiconcavity and concavity.

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