- #1
bhagwad
- 28
- 1
Rudin Theorem 1.21. How does he get "The identity"?
In Theorem 1.21, Rudin says:
The identity [tex] b^n-a^n=(b-a)(b^{n-1}+b^{n-2}a+...+a^{n-1}) [/tex]yields etc etc.
What is this "identity", and do we need to prove it first? If not, what assumption is Rudin making?
In Theorem 1.21, Rudin says:
The identity [tex] b^n-a^n=(b-a)(b^{n-1}+b^{n-2}a+...+a^{n-1}) [/tex]yields etc etc.
What is this "identity", and do we need to prove it first? If not, what assumption is Rudin making?