Mathematics, 05.02.2020 09:47 Yoosungdid911
The matrix c=[1,-2_-3,7] was used to encode a phrase to [7,-28,-25,-35,-2_-21,107,90,123,17 ]. find c^-1 and use it to decode the matrix.
Answers: 2
![C= \left[\begin{array}{cc}1&-2\\-3&7\end{array}\right] \\ C^{-1}= \left[\begin{array}{cc}7&2\\3&1\end{array}\right] \\ \left[\begin{array}{cc}7&2\\3&1\end{array}\right] \times \left[\begin{array}{ccccc}7&-28&-25&-35&-2\\-21&107&90&123&17\end{array}\right] \\ =\left[\begin{array}{ccccc}49-42&-196+214&-175+180&-245+246&-14+34\\21-21&-84+107&-75+90&-105+123&-6+17\end{array}\right] \\ =\left[\begin{array}{ccccc}7&18&5&1&20\\0&23&15&18&11\end{array}\right]](/tpl/images/0503/4309/aceb7.png)
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 21:00, hernandez09297
At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.
Answers: 1
You know the right answer?
The matrix c=[1,-2_-3,7] was used to encode a phrase to [7,-28,-25,-35,-2_-21,107,90,123,17 ]. find...
Questions in other subjects:
SAT, 29.11.2021 21:40
Biology, 29.11.2021 21:40
Mathematics, 29.11.2021 21:40
Mathematics, 29.11.2021 21:40
History, 29.11.2021 21:40
