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Three-dimensional graphs are a way to represent functions with a two-dimensional input and a one-dimensional output.
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Watch video Introduction to 3d graphs | Multivariable calculus | Khan Academy online without registration, duration hours minute second in high quality. This video was added by user Khan Academy 05 May 2016, don't forget to share it with your friends and acquaintances, it has been viewed on our site 394,65 once and liked it 3.5 thousand people.