If p + q = 10 and pq = 5, then the numerical value of $$\frac{p}{q}{\text{ + }}\frac{q}{p}$$ will be?
A. 16
B. 20
C. 22
D. 18
Answer: Option D
Solution(By Examveda Team)
$$\eqalign{ & p + q = 10\,.........{\text{(i)}} \cr & pq = 5 \cr & {\text{Squaring both sides of equation (i)}} \cr & {\left( {p + q} \right)^2} = {\left( {10} \right)^2} \cr & {p^2} + {q^2} + 2pq = 100 \cr & {p^2} + {q^2} + 2 \times 5 = 100 \cr & {p^2} + {q^2} = 90 \cr & {\text{Now,}} \cr & \therefore \frac{p}{q}{\text{ + }}\frac{q}{p} \cr & = \frac{{{p^2} + {q^2}}}{{pq}} \cr & = \frac{{90}}{5} \cr & = 18 \cr} $$Related Questions on Algebra
If $$p \times q = p + q + \frac{p}{q}{\text{,}}$$ then the value of 8 × 2 is?
A. 6
B. 10
C. 14
D. 16
A. $$1 + \frac{1}{{x + 4}}$$
B. x + 4
C. $$\frac{1}{x}$$
D. $$\frac{{x + 4}}{x}$$
A. $$\frac{{20}}{{27}}$$
B. $$\frac{{27}}{{20}}$$
C. $$\frac{6}{8}$$
D. $$\frac{8}{6}$$
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