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


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