What is a non-real number range and a real number range?
I know that infinity and complex numbers are not real numbers but I'm having trouble understanding what a real number range and a non-real number range is. Is a non-real number range (-infinity, infinity)? If so, does (-infinity, 0) or (0,infinity) count as a non-real number range? How do you tell between the two?
Edit1: e.g. how do I approach the real number range for $x^3+3^x$?
algebra-precalculus
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
asked Dec 13 '18 at 9:29
fastworldfastworld
11
|
show 1 more comment
I know that infinity and complex numbers are not real numbers but I'm having trouble understanding what a real number range and a non-real number range is. Is a non-real number range (-infinity, infinity)? If so, does (-infinity, 0) or (0,infinity) count as a non-real number range? How do you tell between the two?
Edit1: e.g. how do I approach the real number range for $x^3+3^x$?
algebra-precalculus
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
asked Dec 13 '18 at 9:29
fastworldfastworld
11
2
Could you provide some additional information? Perhaps use "real number range" in a sentence or problem?
– Michael Burr
Dec 13 '18 at 9:34
Thanks for the suggestion. I have added an example question.
– fastworld
Dec 13 '18 at 9:39
See Extended real number line.
– Mauro ALLEGRANZA
Dec 13 '18 at 9:40
1
Have you a concrete example where the expression "non-real number range" is used ? It sounds strange. Perhaps you've only found "real number range" and you are assuming that there is another "non-real number range"?
– leonbloy
Dec 13 '18 at 11:31
Where are you seeing this terminology? Are you translating from a language other than English?
– Henning Makholm
Dec 13 '18 at 11:38
|
show 1 more comment
I know that infinity and complex numbers are not real numbers but I'm having trouble understanding what a real number range and a non-real number range is. Is a non-real number range (-infinity, infinity)? If so, does (-infinity, 0) or (0,infinity) count as a non-real number range? How do you tell between the two?
Edit1: e.g. how do I approach the real number range for $x^3+3^x$?
algebra-precalculus
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
asked Dec 13 '18 at 9:29
fastworldfastworld
11
I know that infinity and complex numbers are not real numbers but I'm having trouble understanding what a real number range and a non-real number range is. Is a non-real number range (-infinity, infinity)? If so, does (-infinity, 0) or (0,infinity) count as a non-real number range? How do you tell between the two?
Edit1: e.g. how do I approach the real number range for $x^3+3^x$?
algebra-precalculus
algebra-precalculus
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
asked Dec 13 '18 at 9:29
fastworldfastworld
11
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
asked Dec 13 '18 at 9:29
fastworldfastworld
11
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
edited Dec 13 '18 at 11:30
leonbloy
40.3k645107
40.3k645107
asked Dec 13 '18 at 9:29
fastworldfastworld
11
asked Dec 13 '18 at 9:29
fastworldfastworld
11
asked Dec 13 '18 at 9:29
fastworldfastworld
11
11
2
Could you provide some additional information? Perhaps use "real number range" in a sentence or problem?
– Michael Burr
Dec 13 '18 at 9:34
Thanks for the suggestion. I have added an example question.
– fastworld
Dec 13 '18 at 9:39
See Extended real number line.
– Mauro ALLEGRANZA
Dec 13 '18 at 9:40
1
Have you a concrete example where the expression "non-real number range" is used ? It sounds strange. Perhaps you've only found "real number range" and you are assuming that there is another "non-real number range"?
– leonbloy
Dec 13 '18 at 11:31
Where are you seeing this terminology? Are you translating from a language other than English?
– Henning Makholm
Dec 13 '18 at 11:38
|
show 1 more comment
2
Could you provide some additional information? Perhaps use "real number range" in a sentence or problem?
– Michael Burr
Dec 13 '18 at 9:34
Thanks for the suggestion. I have added an example question.
– fastworld
Dec 13 '18 at 9:39
See Extended real number line.
– Mauro ALLEGRANZA
Dec 13 '18 at 9:40
1
Have you a concrete example where the expression "non-real number range" is used ? It sounds strange. Perhaps you've only found "real number range" and you are assuming that there is another "non-real number range"?
– leonbloy
Dec 13 '18 at 11:31
Where are you seeing this terminology? Are you translating from a language other than English?
– Henning Makholm
Dec 13 '18 at 11:38
2
2
Could you provide some additional information? Perhaps use "real number range" in a sentence or problem?
– Michael Burr
Dec 13 '18 at 9:34
Could you provide some additional information? Perhaps use "real number range" in a sentence or problem?
– Michael Burr
Dec 13 '18 at 9:34
Thanks for the suggestion. I have added an example question.
– fastworld
Dec 13 '18 at 9:39
Thanks for the suggestion. I have added an example question.
– fastworld
Dec 13 '18 at 9:39
See Extended real number line.
– Mauro ALLEGRANZA
Dec 13 '18 at 9:40
See Extended real number line.
– Mauro ALLEGRANZA
Dec 13 '18 at 9:40
1
1
Have you a concrete example where the expression "non-real number range" is used ? It sounds strange. Perhaps you've only found "real number range" and you are assuming that there is another "non-real number range"?
– leonbloy
Dec 13 '18 at 11:31
Have you a concrete example where the expression "non-real number range" is used ? It sounds strange. Perhaps you've only found "real number range" and you are assuming that there is another "non-real number range"?
– leonbloy
Dec 13 '18 at 11:31
Where are you seeing this terminology? Are you translating from a language other than English?
– Henning Makholm
Dec 13 '18 at 11:38
Where are you seeing this terminology? Are you translating from a language other than English?
– Henning Makholm
Dec 13 '18 at 11:38
|
show 1 more comment
0
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2
Could you provide some additional information? Perhaps use "real number range" in a sentence or problem?
– Michael Burr
Dec 13 '18 at 9:34
Thanks for the suggestion. I have added an example question.
– fastworld
Dec 13 '18 at 9:39
See Extended real number line.
– Mauro ALLEGRANZA
Dec 13 '18 at 9:40
1
Have you a concrete example where the expression "non-real number range" is used ? It sounds strange. Perhaps you've only found "real number range" and you are assuming that there is another "non-real number range"?
– leonbloy
Dec 13 '18 at 11:31
Where are you seeing this terminology? Are you translating from a language other than English?
– Henning Makholm
Dec 13 '18 at 11:38