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Givena) -3i+5jsame direction as -3i+5jihe length d this vector is{:[sqrt((-3)^(2)+(5)^(2))=sqrt(9+25)=sqrt34],[" unit vector "=(-3)/(sqrt34)i+(5)/(sqrt34)j],[u=(-3)/(sqrt34)i+(5)/(sqrt34j)]:}b) oppositely directed to 12 i-6j+24 k the vector can be witten as(12,-6,24)To get a vector in the oppositedirection. take the opposite sign de cach entry:(-12,6,-24)the length d this vector is sqrt((-12)^( ... See the full answer