Functions

Question 1

What function does not have an inverse function? Why?

Answer 1

Many to one function
As it does not meet the one to one condition required for inverse function

Question 2

For binomial expansion, what is the best for approximation and what is the restriction?

Answer 2

x value - the smaller the better
Rule: Eg (4-x)^8 , |x|< 4 , the integer in the bracket

Question 3

How to make an exponential model

Answer 3

y = Ae^bx
In context ofc where y and x are substituted for the Q
A and B are constants, make simultaneous equations to solve

Question 4

What functions cannot have inverse functions?

Answer 4

Any not one to one