# CAT Quantitative Aptitude Questions | CAT Algebra - Functions questions

###### CAT Questions | Algebra | Functions - Function of a function
CAT Questions

The question is about Function of a function. This is about deriving a new function from given functions. Functions is a simple topic which involves a lot of basic ideas. Make sure that you a get of hold of them by solving these questions. A range of CAT questions can be asked based on this simple concept of Functions questions in the CAT Exam. Make sure you practice a lot of questions in CAT Functions Algebra to push your CAT preparation in the right direction. Functions as an idea is a fabulous idea if one can wrap their head around it the right way, and it has been one of the staple ideas tested by the CAT exam historically.

Question 13: For this question, assume the following operators:
A*B = A2 - B2
A-B = $$frac{A}{B}\\$ A+B = A * B $\frac{A}{B}\\$ = A+B Which of the following expression would yield the result as x subtracted by y? 1.$x*y)-(x+5)
2. ($$frac{x}{y}\\$)*$x-y)
3. (x*y) - ($$frac{x}{y}\\$) 4.$x+y)*(x-y)