e1s2kat26

2020-11-07

Prove that

crocolylec

Skilled2020-11-08Added 100 answers

Step 1. Definitions

Definition combination

with

Pascal's equation

Step 2. Solution

To proof:

Proof by induction

Let P(n) be the statement "

Basis step.

Thus P(2) is true.

Inductive step. Let P(k) be true.

We need to proof that

Thus

Conclution. By the principle of methematical induction, P(n) is true for all positive integers n.

22+64

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