|b| = √(12² + (-5)²) = √(144 + 25) = √169 = 13|2b| = 2|b| = 2 13 = 26|-a| = √((-16)² + (-12)²) = √(256 + 144) = √400 = 20|1/4a| = 1/4 √(16² + (-12)²) = 1/4 √(256 + 144) = 1/4 √400 = 1/4 20 = 5|a-b| = √((16-12)² + (-12-(-5))²) = √(4² + (-7)²) = √(16 + 49) = √65|-1/2a + 2b| = √((-1/2 16 + 2 12)² + (-1/2 (-12) + 2 * (-5))²) = √((-8 + 24)² + (6 - 10)²) = √(16² + (-4)²) = √(256 + 16) = √272 ≈ 16.49
Итак:|b| = 13|2b| = 26|-a| = 20|1/4a| = 5|a-b| ≈ √65|-1/2a+2b| ≈ 16.49
|b| = √(12² + (-5)²) = √(144 + 25) = √169 = 13
|2b| = 2|b| = 2 13 = 26
|-a| = √((-16)² + (-12)²) = √(256 + 144) = √400 = 20
|1/4a| = 1/4 √(16² + (-12)²) = 1/4 √(256 + 144) = 1/4 √400 = 1/4 20 = 5
|a-b| = √((16-12)² + (-12-(-5))²) = √(4² + (-7)²) = √(16 + 49) = √65
|-1/2a + 2b| = √((-1/2 16 + 2 12)² + (-1/2 (-12) + 2 * (-5))²) = √((-8 + 24)² + (6 - 10)²) = √(16² + (-4)²) = √(256 + 16) = √272 ≈ 16.49
Итак:
|b| = 13
|2b| = 26
|-a| = 20
|1/4a| = 5
|a-b| ≈ √65
|-1/2a+2b| ≈ 16.49