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If the n x n matrices A and B are symmetric and B is in- vertible, which of the matrices in Exercises 13 through 20 must he symmetric as well? 13. ЗА 14. —В 15. AB 16. A+ B 17. В -1 18. A10 19. 21, + ЗА - 4A? 20. АВ?А

If the n x n matrices A and B are symmetric and B is in- vertible, which of the matrices in Exercises 13 through 20 must he symmetric as well? 13. ЗА 14. —В 15. AB 16. A+ B 17. В -1 18. A10 19. 21, + ЗА - 4A? 20. АВ?А

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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If the n x n matrices A and B are symmetric and B is in- vertible, which of the matrices in Exercises 13 through 20 must he symmetric as well? 13. ЗА 14. -B 15. AB 16. А + B 17. В -1 18. A10 19. 21, + ЗА - 4A? 20. АВ?А
Transcribed Image Text:If the n x n matrices A and B are symmetric and B is in- vertible, which of the matrices in Exercises 13 through 20 must he symmetric as well? 13. ЗА 14. -B 15. AB 16. А + B 17. В -1 18. A10 19. 21, + ЗА - 4A? 20. АВ?А
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