Author Topic: math p1  (Read 732 times)

Offline mz

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math p1
« on: May 11, 2010, 12:23:59 pm »
okay can someone please clear this confusion?
how do we prove that two vectors are perpendicular and how do we prove they are parallel?
and another thing- i am still not so clear about finding the domains and ranges of functions, questions on this topic confuse me...i do know that the range of f(x) is the domain of f-1(x), but how do we find the range in the first place?

Offline nipuna92

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Re: math p1
« Reply #1 on: May 11, 2010, 12:29:39 pm »
to prove that 2 vectors are perpendicular their dot product is equal to zero

Offline nipuna92

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Re: math p1
« Reply #2 on: May 11, 2010, 12:30:54 pm »
i am still not so clear about finding the domains and ranges of functions, questions on this topic confuse me...i do know that the range of f(x) is the domain of f-1(x), but how do we find the range in the first place?

check this http://www.s-cool.co.uk/alevel/maths/functions/introduction-to-functions.html#domain-and-range

Offline mz

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Re: math p1
« Reply #3 on: May 11, 2010, 12:33:16 pm »
ok thankyou !!!