1.

Which of the following facts are the most essential to know if both the roots ofax^2+bx+c=0are either greater or less than the randomly chosen number k? D a.f(k) Equation of axis of symmetry of the graph Equation of the vertex of the graph Average of the real roots

Answer»

(i), (H) and (iv)
(i)t (II) and (III) or (V)
(i),(ii), (iii) and (iv)
Only (i) and (ii)

Answer :B


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