Question

Sasha thought of a number. She added 22.5 to the number then multiplied the result by 2. a) Write this function as a mapping. b) Use inverse functions to work out the number Sasha thought of. Show your working.

Answer 1

Follows are the solution to these questions:

Explanation:

For point a:

Let the number is = x then,

equation / mapping function:

`\to (x+22.5) * 2=y\\\\`

For point b:

Calculating the inverse function:

`\to x = (y)/(2) -22.5\\\\`

now we change the value of x and y so, it will gives the inverse function in standard parameters:

`\to y = (x)/(2) -22.5\\\\`