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प्रश्न
The mid-point of the line joining (−a, 2b) and (−3a, −4b) is
विकल्प
(2a, 3b)
(−2a, −b)
(2a, b)
(−2a, −3b)
उत्तर
(−2a, −b)
Explanation;
Hint:
Mid−points of line = `((x_1 + x_2)/2, (y_1 + y_2)/2)`
= `((-"a" - 3"a")/2, (2"b" - 4"b")/2)`
= `((-4"a")/2, (-2"b")/2)`
= (−2a, −b)
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