& gt& gt symbol x

& gt& gty = sin(3 * x)/(2 * x)；

& gt& gt limit (y, x, 0)

ans =

3/2

(2)

& gt& gt symbol x

& gt& gty =(x^3+2*x^2- 1)/(2*x^2+3*x+ 1)；

& gt& gt limit (y, x, inf)

ans =

Medium-range nuclear force

2.

& gt& gt symbol x

& gt& gty = 2+x^(3/2)-x；

& gt& gty 1 = diff(y，x)

y 1 =

(3*x^( 1/2))/2 - 1

& gt& gtsubs(y 1，x， 1)

ans =

0.5000

3.( 1)

& gt& gt symbol x

& gt& gty = log(x)/x；

& gt& gtint(y)

ans =

log(x)^2/2

(2)

& gt& gt symbol x

& gt& gty = exp(x)/( 1+exp(2 * x))；

& gt& gtint(y，x，0， 1)

ans =

atan(exp( 1)) - pi/4

3.( 1)

& gt& gty = dsolve('Dy = y*sin(x)'，' x ')

y =

C2/ exit (cos(x))

(2)

& gt& gty = dsolve('x*Dy+3*y=0 '，' y( 1)=2 '，' x ')

y =

2/x^3