Let me write it a little bit neater. I'm just rewriting this term. 1 minus lambda over n to the minus k power. What happens as n approaches infinity? Well, this term, right, lambda's a constant. As this approaches infinity, this term's going to approach 0, so you have 1 to the minus k. 1 to any power is 1, so that term becomes 1. So we have another 1 there.