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Rhys has helped students
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On a 167 day streak. Longest streak: 167 days
29 thank you notes
Someone from Papua New Guinea
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2 weeks ago
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@robin-l
Robin L.
Thank you, Ryhs!
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Rhys
Studying A Level Mathematics and Elementary Number Theory
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380 Answers
201 Edits
@rhys-r
Rhys
wrote an answer to
The function #f# is defined by #f(x)=1-x^2#, #x sub RR#. Show that #f# is NOT one-to-one. Can someone help me please?
.
4 hours ago
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@rhys-r
Rhys
commented
one way to approach this is by showing its actually a many to one mapping, by considering points at e.g #x = 1 # and #x = -1 # to what gives you the same #f(x) # #=> f(1) = f(-1) # hence the function is many to one, meaning there are multiple values for #x# that gives the same #f(x) # hence not one to one
on
The function #f# is defined by #f(x)=1-x^2#, #x sub RR#. Show that #f# is NOT one-to-one. Can someone help me please?
4 hours ago
·
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@rhys-r
Rhys
updated
the answer to
Find the value? #(Tan85^@ - Tan25^@)/(1+Tan85^@Tan25^@)#
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6 hours ago
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@rhys-r
Rhys
commented
Do you mean by regression formulae?
on
How can u calculate the line of best fit by using a table?
yesterday
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@rhys-r
Rhys
commented
Hence meaning he will have 756 at the end, and earn 56 in interest total
on
How much interest will he earn after 8 years?
yesterday
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@rhys-r
Rhys
wrote an answer to
Find the value? #(Tan85^@ - Tan25^@)/(1+Tan85^@Tan25^@)#
.
yesterday
·
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@rhys-r
Rhys
wrote an answer to
What is the limit as x approaches infinity of #e^(-x^2)#?
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yesterday
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@rhys-r
Rhys
commented
#L approx 17888429/2500000 #
on
What is the arc length of #f(x)=xsqrt(x^2-1) # on #x in [3,4] #?
yesterday
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@rhys-r
Rhys
commented
is that #1/2 x = 1 #?
on
Solve (1/2)X=1?
yesterday
·
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@rhys-r
Rhys
wrote an answer to
It is question about series topic geometric series?
.
yesterday
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