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1. Fill in each un-shaded cell of the following chart with one of the following:

ID: 3788938 • Letter: 1

Question

1. Fill in each un-shaded cell of the following chart with one of the following: E (empty), F (finite), C (countably infinite), or U (uncountably infinite) to indicate the result of performing the intersection operation between various sets of numbers.

INTERSECTION

N (naturals)

Z (integers)

Q (rationals)

Q’ (irrationals)

R (reals)

N (naturals)

Z (integers)

Q (rationals)

Q’ (irrationals)

R (reals)

INTERSECTION

N (naturals)

Z (integers)

Q (rationals)

Q’ (irrationals)

R (reals)

N (naturals)

Z (integers)

Q (rationals)

Q’ (irrationals)

R (reals)

Explanation / Answer

natural numbers are countably infinite
integers are countably infinite
rational are countable infinite
irrational are uncountable
Real numbers are uncountable

natural numbers-> 1,2,3...(only positive)

integers->positiive + negative +0

rational-those can be write in ratio
irrational-irrational number is a real number that cannot be expressed as a ratio of integers
real numbers-rational+irrational

INTERSECTION N (naturals) Z (integers) Q (rationals) Q’ (irrationals) R (reals) N (naturals) C C C E C Z (integers) C C C E C Q (rationals) C C C E C Q’ (irrationals) E E E U U R (reals) C C C U U