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Find the cardinal number for the following sets 

 

A = {106, 107, 108, 109,...,142}

B= {106, 108, 110, . . ., 256}

 

n(A) = 

 Sep 8, 2017
 #1
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Find the cardinal number for the following sets 

A = {106, 107, 108, 109,...,142}

B= {106, 108, 110, . . ., 256}

 

Set A = { 106, 107, 108, 109,...,142 }
subtract from each element 105, we have 1, 2, 3, ... , 37
n(A) = 142 -105 = 37

 

Set B = { 106, 108, 110, . . ., 256 }
subtract from each element 104 we have 2, 4, 6, ... , 152
152= 2n

so

n(B) = 152/2 = 76

 

laugh

 Sep 11, 2017

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