The points $(a, b), (c, d),$ and $(\frac{k c + l a}{k + l}, \frac{k d + l b}{k + l})$ are (a) vertices of an equilateral triangle (b) vertices of an isosceles triangle (c) vertices of a right-angled triangle (d) collinear

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The points

(a, b), (c, d),

and

(\frac{k c + l a}{k + l}, \frac{k d + l b}{k + l})

are (a) vertices of an equilateral triangle (b) vertices of an isosceles triangle (c) vertices of a right-angled triangle (d) collinear

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Question Text

The points

(a, b), (c, d),

and

(\frac{k c + l a}{k + l}, \frac{k d + l b}{k + l})

are (a) vertices of an equilateral triangle (b) vertices of an isosceles triangle (c) vertices of a right-angled triangle (d) collinear

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