given the displacement victors A=(3i - 4j +4k)m and B = (2i + 3j-7k)m, find the magnitudes of
a. C= A+B
b. D= 2A-B
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a) A+B=5i - j -3k =√5^2+(-1)^2+(-3)^2=√33=5.74
b) 2A-B=(6i-8j+8k)-(2i+3j-7k)= 4i-11j+56k=√4^2+(-11)^2+56^2 =57.21
b) 2A-B=(6i-8j+8k)-(2i+3j-7k)= 4i-11j+56k=√4^2+(-11)^2+56^2 =57.21
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