Oligodactyly is a condition in which children are born with fewer than ten fingers or ten toes. The image at left is of the hands a person with just four digits on their right hand.
It is worth noting that cartoon characters are very frequently drawn with four digits on each hand, which makes them oligodactyl, too!
You may read more about oligodactyly in this Wikipedia article or simply search for more information using Google.
ive been struggling at uni on an engineering degree with the math but your 4 videos on the various differentiation rules has cracked it for me. Cheers mate!
Matthew Marten (on a CCM YouTube video about Using a Combination of the Chain, Product and Quotient Rules)
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