Solving for Inverse

[VivaTequila]

I normally just say let x=f(y) and then expand the f(y) to whatever the function is and solve, is that wrong?

nah thats completely fine...

Thanks for confirmation. I wasn't even aware that people lost marks for that kind of thing, but I just happened to be doing that anyway.

[abeybaby]

I normally just say let x=f(y) and then expand the f(y) to whatever the function is and solve, is that wrong?

nah thats completely fine...

Thanks for confirmation. I wasn't even aware that people lost marks for that kind of thing, but I just happened to be doing that anyway.

Just to clarify, its fine if you say "LET x=f(y)". but if you just say "x=f(y)", then thats wrong... alternatively, you could say "x=f(y) for inverse"

just dont come out and and state that x IS f(y), because its not...