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.
Tom Le Goff via Getty Images. Young children who are exposed to religion have a hard time differentiating between fact and fiction, according to a new study published in the July issue of Cognitive Science.om Le Goff via Getty Images. Young children who are exposed to religion have a hard time differentiating between fact and fiction, according to a new study published in the July issue of Cognitive Science.