Zad 1 Błąd bezwzględny: Δx = |5,3 - 5| = 0,3 Błąd względny: δ = 0,3 / 5,3 * 100% = 5,7% Zad 2 3(5+2√3+√5) -2√3(√3-7)-√5(√5-3) = 15 + 6√3 + 3√5 - 6 +14√3 - 5 + 3√5 = 20√3 + 6√5 + 4 Zad 3 (2x+2)² + (1-x)(1+x) = 4(1+x)² + (1-x)(1+x) = (1+x)( 4(1+x) + 1-x ) = (1 + x)(3x + 5) Zad 4 (2√2-3)² = (2√2)² + 3² - 2*2√2*3 = 8 + 9 - 12√2 = 17 - 12√2 Zad 5 (√2+3)²+(4-√2)(4+√2) = 2 + 9 + 6√2 + 16 - 2 = 25 + 6√2
1. błąd bezwzględny Δx: [latex]|x-a| = |5,3-5| = 0,3 [/latex] błąd względny δ: [latex]frac{|x-a|}{|x|}*100\% = frac{5,3-5}{5,3}*100\% = frac{0,3}{5,3}*100\%=5,66\% approx5,7\%[/latex] 2. 3(5 + 2√3 + √5) - 2√3(√3 - 7) - √5(√5 - 3) = = 15 + 6√3 + 3√5 - 6 + 14√3 - 5 + 3√5 = 20√3 + 6√5 + 4 3. (2x + 2)² + (1 - x)(1 + x) = [2(1 + x)]² + (1 - x)(1 + x) = = 4(1 + x)(1 + x) + (1 - x)(1 + x) = (1 + x)[4(1 + x) + 1 - x] = = (1 + x)(4 + 4x + 1 - x) = (1 + x)(5 + 3x) 4. (2√2 - 3)² = (2√2)² - 2·2√2·3 + 3² = 8 - 12√2 + 9 = 17 - 12√2 5. (√2 + 3)² + (4 - √2)(4 + √2) = 2 + 6√2 + 9 + 16 - 2 = 25 + 6√2