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సంగ్రస్త మరియు అన్వేక ప్రమేయాలు
Translated from original video
Title - Surjective (onto) and Injective (one-to-one) functions
URL -https://www.khanacademy.org/math/linear-algebra/matrix_transformations/inverse_transformations/v/surjective--onto--and-injective--one-to-one--functions