2. a style of dance music marked by some of the features of jazz.
The graph of y = 2x+1 is a straight line. 1  When x increases, y increases twice as fast, hence 2x. 2  When x is 0, y is already 1.  So: y = 2x + 1.
A partial differential equation (PDE) for the function u ( x 1 , â¯ , x n ) {\displaystyle u(x_{1},\cdots ,x_{n})} is an equation of the form. If f is a linear function of u and its derivatives, then the PDE is called linear.