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What does it mean by find the real root of f(x)
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username3162332
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I was doing an iteration question and in part be they asked me to find the real root of the iteration . Like what's that?
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RDKGames
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#2
(Original post by Rxha)
I was doing an iteration question and in part be they asked me to find the real root of the iteration . Like what's that?
I was doing an iteration question and in part be they asked me to find the real root of the iteration . Like what's that?
If you never studied complex numbers then you don't have to worry about it.
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Vikingninja
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#3
**** explanation but a real number is one that definitely exists, complex (non real) numbers include stuff such as square root -1 which you have to express in more complex ways as they shouldn't exist. A root for f(x) is a value of x where the function is = 0. Basically its just asking you to find a root for the function that does exist.
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Towcestermaths
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(Original post by Vikingninja)
**** explanation but a real number is one that definitely exists, complex (non real) numbers include stuff such as square root -1 which you have to express in more complex ways as they shouldn't exist. A root for f(x) is a value of x where the function is = 0. Basically its just asking you to find a root for the function that does exist.
**** explanation but a real number is one that definitely exists, complex (non real) numbers include stuff such as square root -1 which you have to express in more complex ways as they shouldn't exist. A root for f(x) is a value of x where the function is = 0. Basically its just asking you to find a root for the function that does exist.
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Zacken
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(Original post by Towcestermaths)
Now that is a topic for conversation. In what way does -1.732 or -pi, exist but 3 +2i doesn't?
Now that is a topic for conversation. In what way does -1.732 or -pi, exist but 3 +2i doesn't?
is different from 
.
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Kyx
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B_9710
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_gcx
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(Original post by Towcestermaths)
Now that is a topic for conversation. In what way does -1.732 or -pi, exist but 3 +2i doesn't?
Now that is a topic for conversation. In what way does -1.732 or -pi, exist but 3 +2i doesn't?
most certainly does, and should, exist, and its value is 
. If we claim that complex numbers "should not", or "technically do not" exist then many concepts will fall apart. In all technicality you can write any given real number as
, meaning that any real number could be interpreted as a complex number. There is no part of the conventional definition that implies that real numbers and complex numbers are completely mutually exclusive in this sense (most definitions state it to be a number in the form 
). Obviously, complex numbers with a non-zero complex part cannot be considered real numbers.
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Kyx
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(Original post by B_9710)
The complex number i is certainly not real as the number 1. They both exist, sure but i is certainly not real at all.
The complex number i is certainly not real as the number 1. They both exist, sure but i is certainly not real at all.
The term 'real' number is an unfortunate name
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Jai Sandhu
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