Let f (x) = - 4x and g (x) = 5x2. Andrew finds the composition [f o g] (x) as shown below. What error did Andrew make? = 5 (-4x) 2 = 5 (16x2) = 80x2

Question

Mathematics

Keenan Leonard

21 January, 14:11

Let f (x) = - 4x and g (x) = 5x2. Andrew finds the composition [f o g] (x) as shown below. What error did Andrew make? = 5 (-4x) 2 = 5 (16x2) = 80x2

+1

Answers (1)

Know the Answer?

Skylar Mason · Answer 1

We are given

(x) = - 4x and g (x) = 5x²

The composition of f with g should be done this way:

[f o g] (x) = f [ g (x) ]

= f (5x ²)

= - 4 (5x²)

- 20 x²