MCQOPTIONS
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				| 1. | 
                                    Which of the following relations is valid? | 
                            
| A. | ‚àá x ‚àá x = ‚àá(‚àá . ) - ‚àá2 A | 
| B. | ‚àá x ‚àá x = ‚àá(‚àá x ) - ‚àá2 A | 
| C. | ‚àá x ‚àá x = ‚àá2 A - (‚àá) | 
| D. | none of the above | 
| Answer» B. ‚àá x ‚àá x = ‚àá(‚àá x ) - ‚àá2 A | |