Question

a + b = 20 , ab = 50 ആയാൽ $\frac1a+\frac1b=$ എത്ര ? 

• A. $$\frac{5}{2}$$
• B. $$\frac{2}{5}$$
• C. $$\frac{3}{5}$$
• D. $$\frac{1}{5}$$

Answer 1

Answer:

$$\frac{2}{5}$$

a + b = 20 ab = 50 1/a + 1/b = a + b/ab = 20/50 = 2/5