And (EP/P*), the real exchange rate 2= f (x(s,t),y(s,t)) can be found directly with the Chain Rule for one variable if the "outside" function z = f(x,y) is given in terms of power functions, exponential functions, logarithms, trigonometric functions, and inverse trigonometric functions rather than just by a letter name This is illustrated in the following example Example 4Which means T is independent of x, and, therefore, the tension is constant along the string If we also assume T is independent of t and ‰ is constant along the string, equation (53) can be simplified to utt = T ‰ uxx In general, T and ‰ are nonnegative Therefore, letting c = s T p our equation becomes utt = c2uxx This is known as the wave equationWe will see later that c Solved S 4 Iiie Gldpll Ui D Iulll Liui I I I5 Givull 2 Glz F Men A At What Values Ofx Do The Local Maximum And Minimum Values Of 9 Occur Course Hero S = 1/2 x a x t^2
