Question

Need Help for following Question
Show that :
\[x^{n+1}-y^{n+1} = (x-y)sum_{i=1}^{n} x^{k}y^{n-k}\] for all \[x, y \in \mathbb{R}\] and \[n in \mathbb

Answer 1

divide the whole thing by y^{n+1}, then use geometric series sum formula.

Answer 2

hey experiment thank you, yesterday i was not able to join openstudy again cause of bad internet sorry for late reply