Melody

1/0 is NOT infinity - it is undefined ://

I think that is the reciprocal of owl .....

More about owls :)

325 base 6

\(325_6\\=3*6^2+2*6+5\\ =3*36+12+5\\=108+12+5\\=125_{10}\)

How many CDs does she want?

Do you want the CDs of each genre to be considered identical?

The question is too vague !

Thanks for answering though - maybe it will make more sense to me in the morning  ://

I don't understand Alan :(

Alan could you take a look at this answer please?

y=5tan(x) (a) Find the differential (b) Evaluate dy and Δy when x=π/4 and dx=−0.2

\(y=5tan(x)\\ \frac{dy}{dx}=5sec^2(x)\\ dy=5sec^2(x)dx\\ when \;\;x=\pi/4\;\;and\;\;dx=-0.2\;\;then\\ dy=5sec^2{(\pi/4})\times -0.2\\ dy=5*2\times -0.2\\ dy=-2\\ ~\\ \text{mmm... don't know about }\triangle y ...\)

This is just subrtraction :/

Thanks Alan,

This is the first time I have seen your answer :))

Now there is one less mystery in the universe.  LOL    

Hi Alan,

I think that mathematician already knows this but to say that a number is irrational so therefore, by definition, the digits must go on for ever without a repetitive pattern, offers no explanation of why this is so.

Mathematician is just toying with ideas in a way that I think all mathematicians and potential mathematicians must. Only people with good analytical brains do this.  

I think that many/most people just accept everything that they are told - assuming that they are told by a source that they consider credible.