A shop sells sweets in bags of 7 and 20 what is the largest number of sweets that cannot be purchased exactly?
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Answer:
Step-by-step explanation:
In order to find the inverse of a function, we need to follow a couple of steps.
- Step 1: Write the function as
- Step 2: Swap all x and y values
- Step 3: Solve for y
- Step 4: Replace y with
We can follow these steps to find the inverse of this function.
Step 1: We can just replace the f(x) with y, making our function .
Step 2: We can swap where the x and y values are, making our equation
Step 3: We can now solve for y.
We now have the function as .
Step 4: We can now replace the y with .
Therefore the inverse of is
.
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