Question

If (1,a),(2,b),(c×c,–3) are vertices of triangle then the condition for its centroid to lie on xaxis is

Answer 1

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If (1,a),(2,b),(c×c,–3) are vertices of triangle then the condition for its centroid to lie on xaxis is

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the coordinates of the centroid of the triangle is

$= ( \frac{1 + 2 + c {}^{2} }{3} \: . \: \frac{a + b - 3}{3} )$

Now to be lied on the X axis the ordinate would be zero....

therefore...

a+b-3=0

=>a+b=3

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