### Solution Found!

# Complete the proof of Theorem 6.1

**Chapter 6, Problem 6**

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**QUESTION:**

Complete the proof of Theorem 6.1.

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### Questions & Answers

**QUESTION:**

Complete the proof of Theorem 6.1.

**ANSWER:**

Step 1 of 6

Let V be an inner product space.

Prove the following parts:

(a).

(b) .

(c) .

(d) if and only if .

(e) If for all , then .