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WAEC Further Mathematics 2021 Paper
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© africaexams.com
Question : 19
Total: 38
In
△PQR,
P
Q
= 5i - 2j and
Q
R
= 4i + 3j. Find
R
P
.
-i - 5j
-9 - j
i + 5j
-9i + j
Validate
Solution:
P
Q
= 5i - 2j;
Q
R
= 4i + 3j
R
P
=
P
Q
-
Q
R
= 5i - 2j - [4i + 3j] = 5i - 2j - 4i - 3j
= i - 5j
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