Help - Math Functions Question...!!

[Smile27]

Question 7(b) --- October/November 2005.

It's a function question... Could you please explain how to get the answer and the inverse of the function...?
Thanks...

http://www.xtremepapers.net/CIE/Cambrid ... 5_qp_2.pdf

(The answer to the question in the marking scheme is "0".)

Thanks in advance, your help will appreciated.

 

[switch]

hey

Ok ... here is how it goes :

f(x) = 10^x
therefore f^-1(x) :
swap x - y
therefore : x=10^y
then ...
f^-1(1) :
1 = 10^x
therefore x has to equal zero , as 10^0 = 1

Hope I helped

 

[XPFMember]

Assalamoalaikum!!

nice attempt u get 100% for that

 

[AnnoyingCarrot123]

This question worth 1 mark, so it doesn't need working out. There is a rule in indices... Anything to the power of zero =1

 

[XPFMember]

yeah i know...thanks 4 telling...btw i've done it the other way...i mean the way u said ...in my other thread the same query was posted there too