Given two vectors r;=3i-2j, r2=i+3j, r3=3i-2j, r4=-i+2j, find the modules of the resultant in its case as well as its angle with respect to the x coordinate: а) Гз b) r,+ r2+ r3 c) 2r¡-3r2-5r3 d) 1/2r,-4/3r4

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