Answer:
r =
Step-by-step explanation:
r=30√12,−30√12
Answer:
73/5
Step-by-step explanation:
C is about 55 a is about 95. Step by step explanation:
Answer:
See explanation
Step-by-step explanation:
Prove that

1. When
we have
- in left part
- in right part

2. Assume that for all
following equality is true

3. Prove that for
the following equality is true too.

Consider left part:

Consider right part:

We get the same left and right parts, so the equality is true for
By mathematical induction, this equality is true for all n.