For questions 3 - 6, find F'(x), the inverse of F(x). 3. F(x) = x-10

4. F (x) = x/6 + 3

5. F(x) = 3x + 7

6. F(x) = 8x

Firstly, we need to draw triangle

we know that

O is a centroid

and centroid divides median into 2:1

so,

we have FO=4

so, we can plug it

now, we can find CF

CF=OC+FO

CF=8+4

CF=12

now, we can see triangle ACF is a right angled triangle

so, we can use pythagoras theorem

now, we can solve for x

Since, it is equilateral triangle

so,

we know that

E is a mid-point

so,

now, we can plug values

................Answer