a) |u+v|
b) |u-v|
c) |u|+|v|
d) |3u|+5|v|
a)
a+b= (a, b) + (c, d) = (a+c, b+d)
u+v = (1, -1) + (2, 0)
u+v = (3, -1)
|u+v| = √(3²+(-1)²)
|u+v| = √(9+1)
|u+v| = √10
b)
a-b= (a, b) - (c, d) = (a-c, b-d)
u-v = (1, -1) - (2, 0)
u-v = (-1, -1)
|u-v| = √((-1)²+1²)
|u-v| = √(1+1)
|u-v| = √2
c)
|u| = √(1²+(-1)²)
|u| = √(1+1)
|u| = √2
|v| = √2²+0²)
|v| = √2
|v|+|u| = 2√2
d) u=(1,-1), v=(2,0)
|3u|+5|v|
|3u|= 3(1, -1)
√(3²+(-3)²)
√9+9
√18 = 3√2
|5v|= 5(2, 0)
√(10²+0²)
√100
10
3u|+5|v| = 3√2+10
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