Odpowiedzi

2009-12-05T00:42:49+01:00
1.

3²⁰ x (3³)¹⁰ = 3²⁰ x 3³⁰ = 3⁵⁰

2.

|x+2| ≥ 0
x + 2 ≥ 0 v x + 2 ≤ 0
x ≥ -2 v x ≤ -2

x ∈ R


3.

r = √[(x₂ - x₁)² + (y₂ - y₁)²] = √(36 + 100) = √136 = 2√34
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