Maths-
General
Easy
Question
If 3A =
and A. At = I, then x + y equal to
- –1
- 1
- 2
- None of these
The correct answer is: None of these
AA–1= ![1 over 9](data:image/png;base64,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)
![open square brackets table row 1 2 2 row 2 1 cell negative 2 end cell row x 2 y end table close square brackets](data:image/png;base64,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)
=![1 over 9](data:image/png;base64,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)
![open square brackets table row 9 0 cell x plus 4 plus 2 y end cell row 0 9 cell 2 x plus 2 minus 2 y end cell row cell x plus 4 plus 2 y end cell cell 2 x plus 2 minus 2 y end cell cell x to the power of 2 end exponent plus 4 plus y to the power of 2 end exponent end cell end table close square brackets](data:image/png;base64,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)
I = ![open square brackets table row 1 0 0 row 0 1 0 row 0 0 1 end table close square brackets](data:image/png;base64,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)
x = –2, y = –1
x + y = – 3
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