13 February 2025
Warm-Up Quiz
Inverse Functions
Do Next:
1MWB: Show that fg(x) = 2x2 + 16x + 35
2Here is a number machine.
(a) Work out the output when the input is 5
(b) Work out the input when the output is 19
3Find gf(x)
4Solve fg(x) = gf(x)
5Two sides of a triangle are measured to 1 decimal place.
The angle between the sides is measured to the nearest degree.
Find the Upper Bound of 7.2
Find the Upper Bound of 13.6
6Work out the upper bound for the area of the triangle.
You must show your working.
For all values of x,
f(x) = 2x2 + 3 g(x) = x + 4
(2x2 + 7)
–1.75
= 9
= 10
= 7.25
= 13.65
x= 400 to 1 significant figure.
y= 25 to 2 significant figures.
Work out the maximumintegervalue of
= 18
46.6(4…)
