Asked by Sydney
Find
a + b, 2a + 3b, |a|, and |a − b|.
a = 2i + j, b = i − 5j
a + b, 2a + 3b, |a|, and |a − b|.
a = 2i + j, b = i − 5j
Answers
Answered by
Reiny
a+b = 2i+j + i-5j = 3i - 4j
do 2a + 3b the same way
|a| = √(2^2 + 1^2) = √5
for |a-b| , find a-b first then take the magnitude using your formula
do 2a + 3b the same way
|a| = √(2^2 + 1^2) = √5
for |a-b| , find a-b first then take the magnitude using your formula
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