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Homework: Calculators

Module by: Kenny M. Felder. E-mail the author

Summary: This module provides practice problems which develop concepts related to using a calculator to solve matrices.

Exercise 1

Solve on a calculator: 123456123456 size 12{ left [ matrix { 1 {} # 2 {} # 3 {} ## 4 {} # 5 {} # 6{} } right ]} {}+ 789101112789101112 size 12{ left [ matrix { 7 {} # 8 {} # 9 {} ## "10" {} # "11" {} # "12"{} } right ]} {}

Exercise 2

Solve on a calculator: 123456123456 size 12{ left [ matrix { 1 {} # 2 {} # 3 {} ## 4 {} # 5 {} # 6{} } right ]} {}– 789101112789101112 size 12{ left [ matrix { 7 {} # 8 {} # 9 {} ## "10" {} # "11" {} # "12"{} } right ]} {}

Exercise 3

Solve on a calculator: 123456123456 size 12{ left [ matrix { 1 {} # 2 {} # 3 {} ## 4 {} # 5 {} # 6{} } right ]} {}789101112789101112 size 12{ left [ matrix { 7 {} # 8 {} # 9 {} ## "10" {} # "11" {} # "12"{} } right ]} {}

Exercise 4

Find the inverse of the matrix 128456789128456789 size 12{ left [ matrix { 1 {} # 2 {} # 8 {} ## 4 {} # 5 {} # 6 {} ## 7 {} # 8 {} # 9{} } right ]} {}.

Exercise 5

Multiply the matrix 128456789128456789 size 12{ left [ matrix { 1 {} # 2 {} # 8 {} ## 4 {} # 5 {} # 6 {} ## 7 {} # 8 {} # 9{} } right ]} {} by its own inverse. What do you get? Is it what you expected?

Exercise 6

Matrix AA is 612095612095 size 12{ left [ matrix { 6 {} # 1 {} # 2 {} ## 0 {} # 9 {} # 5{} } right ]} {}. Matrix BB is 10−2347010−23470 size 12{ left [ matrix { "10" {} # - 2 {} # 3 {} ## 4 {} # 7 {} # 0{} } right ]} {}. Matrix CC is −6129732−6129732 size 12{ left [ matrix { - 6 {} # "12" {} ## 9 {} # 7 {} ## 3 {} # 2{} } right ]} {}. Use your calculator to find…

  • a. ACAC
  • b. CACA
  • c. ( A + B ) C(A+B)C
  • d. 2 A + 12B2A+12B

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Definition of a lens

Lenses

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Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

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