Problem

Problem

If q2−4pr=0,p>0q^2 - 4pr = 0, p > 0 , then the domain of the function f(x)=log⁡(px3+(p+q)x2+(q+r)x+r)f(x) = \log(px^3 + (p+q)x^2 + (q+r)x + r) is: (a) R−{−q2p}R - \left\{ -\frac{q}{2p} \right\} (b) R−[(−∞,−1]∪{−q2p}]R - \left[ (-\infty, -1] \cup \left\{ -\frac{q}{2p} \right\} \right] (c) R−[(−∞,−1)∩{−q2p}]R - \left[ (-\infty, -1) \cap \left\{ -\frac{q}{2p} \right\} \right] (d) RR

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