If a * b=\dfrac{a \times b}{a+b} for a, b positive integers, then what is 5 * 10 ?
Answer Choices
A. \dfrac{3}{10}
B. 1
C. 2
D. \dfrac{10}{3}
E. 50
If a * b=\dfrac{a \times b}{a+b} for a, b positive integers, then what is 5 * 10 ?
Answer Choices
A. \dfrac{3}{10}
B. 1
C. 2
D. \dfrac{10}{3}
E. 50