we are given the ordinary differential equation of dy/dx = 2y+1. The ODE is variable separable which means x and y can be grouped altogether explicitly. In this case, the equation becomesdy / 2y + 1 = dx
1/2 ln (2y + 1) = x + ln Cln (2y + 1) = 2x + ln C2y + 1 = C e 2x y = (C e 2x - 1)/2
The ODE y' + xy = x can be grouped into y' + x(y-1) = 0 'y' / y-1 = -xThis is variable separable
Percentage decrease = (original number - new number) / original number...* 100
percentage decrease = (2.55 -2.20) / 2.55....* 100
0.35 / 2.55.....* 100
0.137 * 100
13.7% decrease <===
%69 of visited only one place
Yes it is because the negative is in parrenthases