Qualification > Sciences
Maths & Physics Help
shivluvchem:
We dont have log in our sylabus!
And the ans is not 1 it is 0!
It says in the marking scheme!
astarmathsandphysics:
f(x)=log10x
and f-1(x)=10^x
so if you start with 1, you get log1=0 then 10^0=1, but it is irrelevant. It is just to do with f and f-1. You wnd up with the thing you started with
shivluvchem:
Sorry but i didn't understand!
astarmathsandphysics:
Think of powers. x^2*x^-2=1
but but f(f-1(x))=x
an inverse to f undoes f so you end up with what you started.
igvictim:
Hi,
I am about to have my science paper 3 IG very soon, and I was wondering which are the most common physics equations that appear in this paper.
thank you
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