Q.
P=(−5,4) and Q=(−2,−3) . If PQ¯ is produced to R such that p divides QR¯ externally in the ratio 1:2 , thenR is
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a
(1,10)
b
(1,−10)
c
(10,1)
d
(2,−10)
answer is B.
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Detailed Solution
P divides QR in the ratio1:2 externally ⇒PQ:PR=1:2⇒2PQ=PR ⇒Q is the midpoint of PR⇒R=2Q−P=(1,−10)
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