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The identity element in the group M={((...

The identity element in the group `M={((x,x),(x,x))|x in R, x ne 0|}` with respect to matrix multiplication is..

A

`((1,1),(1,1))`

B

`1/2 ((1,1),(1,1))`

C

`((1,0),(0,1))`

D

`((0,1),(1,0))`

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The correct Answer is:
B
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