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सदिश veca=3hati+4hatj-2hatk के समान्तर ए...

सदिश `veca=3hati+4hatj-2hatk` के समान्तर एकक सदिश क्या है? `veca` में किस सदिश का योग किया जाये कि परिणामी सदिश `hati` हो जाये?

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