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If veca=hatj-hatk and vecc=hati+hatj+hat...

If `veca=hatj-hatk` and `vecc=hati+hatj+hatk` are given vectors, and `vecb` is such that `veca.vecb=3` and `vecaxxvecb+vecc=0` than `|vecb|^(2)` is equal to ………………

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