Of course you can use the quotient rule, but it is usually not the easiest method. If we do use it here, we get $${d\over dx}{10\over x^2}={x^2\cdot 0-10\cdot 2x\over x^4}= {-20\over x^3},$$ since the derivative of 10 is 0.
1 Young children can't tell the difference between fantasy and reality. 2  Your preschooler's rich imagination is a big part of his normal development, but that means it is usually hard for him to tell the difference between what's real and what's imaginary.
Ursula Le Guin has written that âfantasy is true, of course. It isnât factual, but it is true.â1The fantasy genre involves a different way of apprehending existence but it is no less true than realism. Fantasy stories can suggest universal truths through the use of magic and the supernatural.