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Maximum/Minimum Problems
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11X1 T10 04 maximum and minimum problems (2010)

Jul 12, 2015

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Nigel Simmons
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Page 1: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

Page 2: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum ProblemsMaximum/minimum problems involve finding the vertex of a quadratic

Page 3: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum ProblemsMaximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

Page 4: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

Page 5: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

Page 6: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

Page 7: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x 2 13 5

3x x

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

Page 8: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x 2 13 5

3x x

21 13 5

6 12x

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

Page 9: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x 2 13 5

3x x

21 13 5

6 12x

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

21 113 46 12

x

Page 10: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x 2 13 5

3x x

21 13 5

6 12x

11maximum value is 412

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

21 113 46 12

x

Page 11: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x 2 13 5

3x x

21 13 5

6 12x

11maximum value is 412

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

21 113 46 12

x

OR 21 4 3 559

Page 12: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x 2 13 5

3x x

21 13 5

6 12x

11maximum value is 412

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

21 113 46 12

x

OR 21 4 3 559

maximum value4a

Page 13: 11X1 T10 04 maximum and minimum problems (2010)

Maximum/Minimum Problems

2e.g. ( ) Find the maximum value of 3 5i y x x

23 5y x x 2 13 5

3x x

21 13 5

6 12x

11maximum value is 412

Maximum/minimum problems involve finding the vertex of a quadraticRead the question carefully to see if it is the x value or the y value you are required to find.

(Need to find the y value of the vertex)

21 113 46 12

x

OR 21 4 3 559

maximum value4a

5912

11412

Page 14: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

Page 15: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

Page 16: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

Page 17: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s

Page 18: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s 32A s s

Page 19: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s 32A s s

We want the dimensions, so it is the x value of the vertex we need to find.

Page 20: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s 32A s s

We want the dimensions, so it is the x value of the vertex we need to find.

232A s s

Page 21: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s 32A s s

We want the dimensions, so it is the x value of the vertex we need to find.

232A s s

2 32s s

Page 22: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s 32A s s

We want the dimensions, so it is the x value of the vertex we need to find.

232A s s

2 32s s

216 256s

Page 23: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s 32A s s

We want the dimensions, so it is the x value of the vertex we need to find.

232A s s

2 32s s

216 256s

dimensions for a maximum area are 16cm 16cm

Page 24: 11X1 T10 04 maximum and minimum problems (2010)

(ii) A rectangle has perimeter of 64 cm. What dimensions would the rectangle have for maximum area?

s

32 s 32A s s

We want the dimensions, so it is the x value of the vertex we need to find.

232A s s

2 32s s

216 256s

dimensions for a maximum area are 16cm 16cm

Exercise 8E; 1a iv, 2a iii, then multiples of 3