Maths-
General
Easy
Question
If A2 = 8A + kI where A =
then k is :
- 7
- –7
- 1
- –1
The correct answer is: –7
= 8
+ k![open square brackets table row 1 0 row 0 1 end table close square brackets](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAqCAYAAADxughHAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAaPUZr5AAAAS1JREFUeNrtmjEKwkAQRS1ELETwEt7DJliIhWDhBaztxTuIhSAiFrZeQcTSzmuksZQggv7FCaRYg2SH7E6YgVdkgmQf2Y2bT2q1b70thFq5Yw154P+IqYipLliAm8Mg2mANrsSGeqWKHMDU8W6ewDBzPKCel6lV9LdjsLL0l2AiSeQIIku/R+fEiNxBw9I3vViSyCvn3LMqIokkkfjH1GpKm1pmQfct/UjaYh+BraW/l/b4NXUGM1CnaTYHl7L/EDl2zB2wo8X9oC1KSzeNKqIiKqIiKqIiKqIi1RDhyKPScs3HnEQ48qi0XPOxwiJceRTXe01hEa48yrsIVx7lXYQrjwpaJJEkwpVHBbHYOfIo7yJceZR3EVMceVQQIhx5VPbaLvmYbhqDFxH9wcAHwkm6EzeHddYAAADvdEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCI+PG1mZW5jZWQgY2xvc2U9Il0iIG9wZW49IlsiIHNlcGFyYXRvcnM9InwiPjxtdGFibGU+PG10cj48bXRkPjxtbj4xPC9tbj48L210ZD48bXRkPjxtbj4wPC9tbj48L210ZD48L210cj48bXRyPjxtdGQ+PG1uPjA8L21uPjwvbXRkPjxtdGQ+PG1uPjE8L21uPjwvbXRkPjwvbXRyPjwvbXRhYmxlPjwvbWZlbmNlZD48L21hdGg+oa0HGwAAAABJRU5ErkJggg==)
or
=
+![open square brackets table row k 0 row 0 k end table close square brackets](data:image/png;base64,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)
or
= ![open square brackets table row cell k plus 8 end cell 0 row cell negative 8 end cell cell k plus 56 end cell end table close square brackets](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHIAAAAqCAYAAABvAA/nAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAaPUZr5AAAAxdJREFUeNrtXEFkXFEUfUbEqCpZdBFddFMVNSpUVEXVUCOiIoaoyDJEdVHVTRdVXZUuuqguSlREF1UqZtFFhKqKLqpUFl1UhawiIpssIuobIb3XnOH7eTP9f+Td/++4h8P/b56Z/96Zd9+9b45xroVjDw3FRFetTDjdwpqQJqRzf4klgQc9Q3xNPCRGxDXihRwn7hzxDfEHuIg2lUJeIv4SetAl4nPiAHGQ+AITmBe+EKdi93fQplLIaeKH0/rw/yBK3HMUaOY0aTOIDkm8Is5qFPIZ8TGueaW8I04GEpJD6tmEkNs5TdoKseZpr+I1dUJ+xKos47oacEXyCngQu79BfJnTpO0jvCfBbXsahdwkVoifiNcDh9arCKXMdeIu8WZOk3bU5bWmNiFLyFi/Q8xei9g0BxAXie+Jw7GVcI24BYGLJGSkTUhegV+xuS8FTnYaHQSr4hmksdchtJY1hlYWcBnXvFfdCyhkVLAVwAnNhKe9pjHZ4eRjIXb/mTgeSMjfqFmTuIK9Uhp14ltP+7LG8qORKDWGUKAPBxCyDjGr2JtLuN7qMRKcBjikP4wdUDxBEqbuQGAfe0IcFZxulAMV4RvICiNM2nSOEzeE3CBC0reYqHNVlR+G4sCENCENJqTBhDSYkCakwYQ0mJAGE9KENJiQBhOyDSnvqoQXN6sLYsy1fE8HGDvbZ25pFVLCuyrlxc0ylwsQ7jLu2eg8R/ymVUgJ76qUFzdtP/5x/Ge/hVYJ76qUFzdtP/4dc7bfhJTwrkp5cdP2++OyuSpUCCnhXZXy4h5jHJy8rBIfOb+DIMLe2EAS1kSonSuKkFk9rBLeVUkvrouFbx7HU6y+Ec/7byC8D+AZx/GFu69xRUp4VyW9uD7U3EmD1kGHEmuUuKNRSAnvqqQXN+1YVrvUtE2NQkp4VyW9uD5UsFXEweHzrqfvSMYaujBCSnhXJb24DWTd7bFMYCz1RL9BhNt57JHtLYAPLW5rzVpDe1clvbgzSFiO8Llc6ox16HvetZzrh+i/3kO2bofmfQITsl+FtD9M0iPcCa3+AXW2RQL0dR3RAAABInRFWHRNYXRoTUwAPG1hdGggeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzE5OTgvTWF0aC9NYXRoTUwiPjxtZmVuY2VkIGNsb3NlPSJdIiBvcGVuPSJbIiBzZXBhcmF0b3JzPSJ8Ij48bXRhYmxlPjxtdHI+PG10ZD48bWk+azwvbWk+PG1vPis8L21vPjxtbj44PC9tbj48L210ZD48bXRkPjxtbj4wPC9tbj48L210ZD48L210cj48bXRyPjxtdGQ+PG1vPi08L21vPjxtbj44PC9tbj48L210ZD48bXRkPjxtaT5rPC9taT48bW8+KzwvbW8+PG1uPjU2PC9tbj48L210ZD48L210cj48L210YWJsZT48L21mZW5jZWQ+PC9tYXRoPsHdb38AAAAASUVORK5CYII=)
1 = k + 8
49 = k + 56
k = – 7
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