3Tvwo Test yourself, p.262/263 T1-T4

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

Today, 'Test yourself', p.262/263 is the Homework.

However....

+  Only the first half, T1 - T4, has to be done.

+ First we look at T2, that has something new.

Let's read T2 together, first:

Suppose the formula did not have the 

' +4500 ' part!     Question:

How would you calculate b) then?

Answer:

1.   Take n = 20 and  n = 50  and 

2. take the mean:

      (20 + 50) : 2 = 35

3.   fill this in, in the formula and

4.   now you now the maximum profit!

Question 2:

What difference does it make, for calculating the maximum profit, having ' + 4500 ' in the formula, or not?

Answer 2:

For the way to calculate the maximum profit, 

it makes NO DIFFERENCE at all!

The graph with ' +4500 ' added is just 4500 higher than the other one. The n of the vertex stays the same!

Question 3: Think of a way to solve

question c: 

Answer part 1:

We need to know for which values of n is P(n) positive.

Some clues:

+ The formula corresponds to a downward opening parabola. 

+ Find the p.o.i. with the P axis.

+ So between n=..  and n=..    there is a profit made!

Answer, part 2:

We just have a quick look at the Solution, to have an idea how to tackle this one!

Difference:

Study squarers do T2c, but

Classroomers do not have to do this one.

Homework time.

+ Homework = T1,2,3 and 4 on p.262.

+ Good luck, and

+ do not forget to check with the Solutionsbook!