Hello student.
These are the three forces mentioned in the question.
F1=3i-4j+2k
F2=2i+3j-k
F3=2i+4j-5k
Resultant of these forces in sum of these forces. So add up these three.
There by Resultant of these forces is F1+F2+F3
which is equal to (3i-4j+2k +(2i+3j-k )+(2i+4j-5k )
7i+3j-4k is the required answer
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