यदि \(\rm\overrightarrow{r}\) = xî + yĵ + zk̂ है, तो (\(\rm\overrightarrow{r}\) × î)⋅(\(\rm\overrightarrow{r}\) × ĵ) + xy = ________क्या होगा?

1
−2xy
2
2xy
3
0
4
xy

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