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Dreading ordinary level maths!!!!
Comments
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Attachment wont work
Really?
hmm
x^\frac{a}{b}=\sqrt{x^a}$\\
So $8^\frac{1}{3}=\sqrt[3]{8^1}$\\
=\sqrt[3]{8}=2$\\
Similarly, $4^\frac{1}{4}=\sqrt{2}$ (ie. $2^\frac{1}{2}$)\\
Note that $x^a\times x^b=x^{a+b}$,
so
\[(8^\frac{1}{3})(4^\frac{1}{4})=2^{5-x}\]
filling in the answers gotten from parts i and ii
\[(2)(\sqrt{2})=2^{5-x}\]
\[(2^{1.5}=2^{5-x}\]
So $1.5=5-x$ giving $x=3.5$
Any good to you?
edit:
x^(a/b)=bth root of (x^a)
So 8^(1/3)=Cube root of(8^1)
=Cube root of (8)=2
Similarly, 4^(1/4)=sqrt(2) (ie. 2^(1/2))
Note that (x^a)(x^b)=x^(a+b),
so
(8^(1/3))(4^(1/4))=2^(5-x)
filling in the answers gotten from parts i and ii
(2)(\sqrt(2))=2^(5-x)
2^(1.5)=2^(5-x)
So 1.5=5-x giving x=3.50 -
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Wait, wait, wait.... Now it makes more senseReally?
hmm
x^\frac{a}{b}=\sqrt{x^a}$\\
So $8^\frac{1}{3}=\sqrt[3]{8^1}$\\
=\sqrt[3]{8}=2$\\
Similarly, $4^\frac{1}{4}=\sqrt{2}$ (ie. $2^\frac{1}{2}$)\\
Note that $x^a\times x^b=x^{a+b}$,
so
\[(8^\frac{1}{3})(4^\frac{1}{4})=2^{5-x}\]
filling in the answers gotten from parts i and ii
\[(2)(\sqrt{2})=2^{5-x}\]
\[(2^{1.5}=2^{5-x}\]
So $1.5=5-x$ giving $x=3.5$
Any good to you?
edit:
x^(a/b)=bth root of (x^a)
So 8^(1/3)=Cube root of(8^1)
=Cube root of (8)=2
Similarly, 4^(1/4)=sqrt(2) (ie. 2^(1/2))
Note that (x^a)(x^b)=x^(a+b),
so
(8^(1/3))(4^(1/4))=2^(5-x)
filling in the answers gotten from parts i and ii
(2)(\sqrt(2))=2^(5-x)
2^(1.5)=2^(5-x)
So 1.5=5-x giving x=3.5
Thank you so much
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Wait, wait, wait.... Now it makes more sense
Thank you so much
Go get your log tables right now and make sure you are familiar with what's where!
Not wanting to offend anybody but I know that the students in one of the ordinary level classes in my school have never owned a log tables. The teacher photocopies what they need for each chapter and for the Summers and Christmas tests and stuff the teacher includes photocopies of the pages in the log tables that they need! I think it's mad!
So yeah, look at your log tables!0 -
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In relation to that question! I DONT EVEN KNOW WHERE I SHOULD LOOK
My teacher never went throught the Log tables with us:/
Haven't mine with me but there is an index at the start. Maybe go to school a bit early and try and borrow a set of somebody just to have a look at them.
Everything for maths is at the start however there is some tax formulas which I think you use in ordinary level. They are under the economics section!0 -
I have my own! Just barely use them :LLilMissCiara wrote: »Haven't mine with me but there is an index at the start. Maybe go to school a bit early and try and borrow a set of somebody just to have a look at them.
Everything for maths is at the start however there is some tax formulas which I think you use in ordinary level. They are under the economics section!
I'll have a glance through though 0 -
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