Calculus Michael Spivak 3th ed. Pag 46: Function as a rule

[xorg]

Pag 46 says:

He begins to do a rethink about what is a function.
Function is a rule? If it is a rule then:
f(x) = x²
and
f(x) = x² +3x + 3 -3(x+1)
are different. But that was not what we wanted.

But he rewrites, this way:
f(x) = x²
and
f(x) = x² +3x +3 -c(x+1)

Apparently this was a small mistake.

I would like to hear the opinion of colleagues. Thank you.

 

[wabbit]

Looks like a typo yes. Every book has a few, you should just correct it as you did and carry on.

 

[jbunniii]

I have the first edition, which doesn't have the typo. Sometimes books get worse instead of better when new editions are published.

 

[wabbit]

Ah, entropy...