Question

If vector a=3i+2j and vector b=i-2j+3k,then find the magnitude of a+b and a-b

Answer 1

a+b

*a=(3i+2j)+b=(i-2j+3k)

*3i+2j+i-2j+3k

*3i+i+2j-2j+3k

*4i+0j+3k

*4i+3k

*and  a-b

*a=(3i+2j)-b=(i-2j+3k)

*3i+2j-i-2j+3k

*3i-i+2j-2j+3k

*4i+0j+3k

*4i+3k

*a+b=a-b.

Answer 2

Answer:

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