The following equation is given xu_x + ( x+ y)u_y = u +1 a. Find the general solution of the problem explicitly, that is, write u as the most general function of x, y , in the range x, y > 0 .
b. Find the particular solution obeying u(x,0) = x^2

B.

Step-by-step explanation:

:D

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: