In ?PQR, \(\overline{PQ}\) = 5i - 2j and \(\overline{QR}\) = 4i + 3j. Find \(\overline{RP}\)....
FURTHER MATHEMATICS
WAEC 2021
In?PQR,\(\overline{PQ}\) = 5i - 2j and \(\overline{QR}\) = 4i + 3j. Find \(\overline{RP}\).
- A. -i - 5j
- B. -9 - j
- C. i + 5j
- D. -9i + j
Correct Answer: A. -i - 5j
Explanation
\(\overline{PQ}\) = 5i - 2j; \(\overline{QR}\) = 4i + 3j
\(\overline{RP}\) = \(\overline{PQ}\) - \(\overline{QR}\)
= 5i - 2j - [4i + 3j] = 5i - 2j - 4i - 3j
= i - 5j
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