Write the Word or Phrase That Best Completes Each Statement $$\mathrm { f } = \frac { \mathrm { f } _ { 1 } \mathrm { f } _ { 2 } } { \mathrm { f } _ { 1 } + \mathrm { f } _ { 2 } }$$

Essay

Write the word or phrase that best completes each statement or answers the question.
Solve the problem.
-When two lenses are placed next to each other, their combined focal length (a measurement that can be negative or
positive) is described by the equation $$\mathrm { f } = \frac { \mathrm { f } _ { 1 } \mathrm { f } _ { 2 } } { \mathrm { f } _ { 1 } + \mathrm { f } _ { 2 } }$$ If f1 = 0.001, what are the asymptotes of this function?