One more question. Is (x^-1 + y^-1)^-2 = x^2 + y^2? Thanks anyone who can help, please answer =)
also, this is not right. we can distribute powers across products, not sums
for instance, but rather
similarly,
if you don't like negative powers in the denominator, you could approach it this way
also, please post new problems in a new thread. it saves me the work of having to split the thread up