1.

If l and m are the roots of the equation 4x2 + 3x + 7, then \(\frac{1}{l} + \frac{1}{m} = \;?\)

A. \(\frac{3}{7}\)
B. \( - \frac{3}{7}\)
C. ​\( - \frac{7}{3}\)
D. \(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)\(\frac{7}{3}\)
Answer» C. ​\( - \frac{7}{3}\)


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