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CBSE Class 12-science Answered

find inverse of matrx using elementary row operation (i)   1     2        2    -1 ii )    2      5        -3      1 ignore ithe absence of braclet and consider it in square bracket also sate the key method to find matrix
Asked by haroonrashidgkp | 26 Mar, 2018, 09:11: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight A equals open square brackets table row 1 2 row 2 cell negative 1 end cell end table close square brackets open vertical bar straight A close vertical bar equals negative 1 minus 4 equals negative 5 not equal to 0 straight A to the power of negative 1 end exponent space exist. rightwards double arrow straight A straight A to the power of negative 1 end exponent equals straight I rightwards double arrow open square brackets table row 1 2 row 2 cell negative 1 end cell end table close square brackets straight A to the power of negative 1 end exponent equals open square brackets table row 1 0 row 0 1 end table close square brackets straight R subscript 2 minus 2 straight R subscript 1 rightwards double arrow open square brackets table row 1 2 row 0 cell negative 5 end cell end table close square brackets straight A to the power of negative 1 end exponent equals open square brackets table row 1 0 row cell negative 2 end cell 1 end table close square brackets fraction numerator straight R subscript 2 over denominator negative 5 end fraction rightwards double arrow open square brackets table row 1 2 row 0 1 end table close square brackets straight A to the power of negative 1 end exponent equals open square brackets table row 1 0 row cell 2 over 5 end cell cell fraction numerator negative 1 over denominator 5 end fraction end cell end table close square brackets straight R subscript 1 minus 2 straight R subscript 2 rightwards double arrow open square brackets table row 1 0 row 0 1 end table close square brackets straight A to the power of negative 1 end exponent equals open square brackets table row cell 1 fifth end cell cell 2 over 5 end cell row cell 2 over 5 end cell cell fraction numerator negative 1 over denominator 5 end fraction end cell end table close square brackets rightwards double arrow straight A to the power of negative 1 end exponent equals 1 fifth open square brackets table row 1 2 row 2 cell negative 1 end cell end table close square brackets Similarly space you space can space find space inverse space of space second space matrix. end style
Answered by Sneha shidid | 27 Mar, 2018, 09:05: AM

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CBSE 12-science - Maths
how to solve the adjoint of 3×3 matrix
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CBSE 12-science - Maths
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CBSE 12-science - Maths
find inverse of matrix using elementary row operation(ignore absence of bracket) 0   1     2 1   2     3 3   1     1
Asked by haroonrashidgkp | 31 Mar, 2018, 12:12: PM
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CBSE 12-science - Maths
find inverse of matrx using elementary row operation (i)   1     2        2    -1 ii )    2      5        -3      1 ignore ithe absence of braclet and consider it in square bracket also sate the key method to find matrix
Asked by haroonrashidgkp | 26 Mar, 2018, 09:11: PM
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