MCQOPTIONS
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| 1. |
If a and b are integers and \[a\ne b,\] then which of the following is INCORRECT ? |
| A. | \[a+b=b+a\] |
| B. | \[a-b=b-a\] |
| C. | \[a+0=0+a=a\] |
| D. | \[a-0=a\ne 0-a\] |
| Answer» C. \[a+0=0+a=a\] | |