falkqwer2011
The number (1.333and so on) belongs to which set of numbers?
-rrational numbers
-rational numbers, integers, and whole numbers
-rational numbers and integers but not whole numbers
-rational numbers but not integers or whole numbers
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apple_pi
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First some definitions
integer: any whole number e.g. -1,0,1
rational: can be expressed as a fraction with integral numerator and denominator. e.g. 1.25
TheMind
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all repeating numbers are rational
falkqwer2011
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ok o.O
falkqwer2011
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so its rational?
apple_pi
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yes. do you know how to turn a repeating into a fraction to show it is rational?
falkqwer2011
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no
apple_pi
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Ok, in this case 1.33333...
let n = 1.33333...
10n = 13.33333...
10n-n = 12
9n = 12
n = 12/9
falkqwer2011
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wait so the answer is d right?
apple_pi
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yes
falkqwer2011
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cool thx for explaining
apple_pi
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sure, anytime
apple_pi
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Oh and by the way, welcome to OpenStudy