If →PQ = -2i + 5j and →RQ = -i - 7j, find →PR
-3i + 12j
-3i - 12j
-i + 12j
i - 12j
Correct answer is C
→PQ = →PR + →RQ →PR = →PQ - →RQ →PR = -2i + 5j - (-i - 7j) →PR = -2i + 5j + i + 7j →PR = -i + 12j.
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