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### Question Asked by a Student from EXXAMM.com Team

** Q 2211691529. ** If unit vectors `hat(i)` and `hat(j)` are at right angles to each other and

`vec(p) = 3 hat(i)+ 4 hat(j) , vec(q) = 5 hat(i) , 4 vec(r) = vec(p) +vec(q) `, then `2 vec(s) = vec(p) - vec(q)`