Question

The function f is defined by f:x = 2x^2−12x+13 for 0≤x≤A,where A is a constant.

i) State the value of A for which the graph of y = f(x) has a line of symmetry.
ii) When A has this value, find the range of f.

Answer 1

Why is the A so high up?

Answer 2

Supposedly A =6

Answer 3

Please explain more.

Answer 4

Anyways, I got it already. What about the next ques?

Answer 5

Substitue 6 into the equation. Hence 13 right? and -5 comes from the a(x+b)2+c equation right?

Answer 6

Okok. Thanks. I grasp it already. Your explanation is too lengthy.