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Condition for Concurrency of Three Lines

If the diagra...

Question

If the diagram in Fig. 2.22 shows the graph of the polynomial f(x) = ax² + bx + c, then

(a) a > 0, b < 0 and c > 0
(b) a < 0, b < 0 and c < 0
(c) a < 0, b > 0 and c > 0
(d) a < 0, b > 0 and c < 0

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Solution

Clearly, represent a parabola opening upwards.

Therefore, cuts Y axis at P which lies on . Putting x = 0 in , we get y = c. So the coordinates of P is. Clearly, P lies on. Therefore

Hence, the correct choice is

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Condition for Concurrency of Three Lines

Standard X Mathematics

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