document.write( "Question 468011: find the cardinal number for each set
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Algebra.Com's Answer #321090 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "find the cardinal number for the set
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document.write( "B={1,3,5,...,21}  |arithmetic sequence where d = 2
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document.write( "   21 = 2n- 1
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document.write( "   22 = 2n
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document.write( "   11 = n, 21 is the 11th term, that is, this set has 11 terms 
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document.write( "  cardinal number for this set is 11
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