sympy基础知识1.sympy
importsympyprint (sympy.pi.evalf ) )圆周率print ) sympy.e ) eprint ) sympy.I )虚数iprint ) sympy.oo )无限大prinnt
importsympyprint (sympy.sin (sympy.pi/4 ).evalf () ) print (sympy.cos ) sympy.pi/3 (.evalf ) ) ) PPP
importsympyx=sympy.symbol(x ) ) print ) sympy.e**x ) e**xprint (sympy.exp ) x ) ) e * * xprint ) sympy
以importsympyprint (sympy.log (100，10 ) ) #10为底的100个对数print (sympy.log ) sympy.E**3，sympy.e ) )为底的e *
求出importsympyprint(sympy.sqrt(16 ) )平方根print (sympy.root ) 16，4 ) #4乘方print (sympy.factorial ) )阶乘a=
importsympYY1=x**2*x1y2=x*(x2 ) print(sympy.expand ) y2 ) #展开print(sympy.factor(y1 ) )通用因子表达式(折叠) ympy
importsympyprint (sympy.simplify ((x * * 3x * *2- x-1 )x**2*x1 ) ) )退化打印(sympy.trigsimp )
importsympyx=sympy.symbol(x ) y=sympy.symbol ) y ) f=x**2) x 9打印) sympy.solve ) f，x ) #有限解f1 y )无限解F2
importsympyfb=sympy.sin(x )/xprint ) sympy.limit ) FB，x，0 ) #极限x朝向0时的值print ) sympy.limit ) FB，x，sympy .
importsympyfa=3*sympy.exp(x**3)2*x17print ) sympy.diff (fa，x ) ) #主求导print (sympy.diff ) fa，x，2
import sympyx，y=sympy.symbol(x )，sympy.symbol ) x，y=sympy.symbol(x ) ) fc=2*x**23* ) )。 y ) (对#y为一阶偏导光导print(sympy.diff(fc，y，y ) )对y为二阶偏导光导print (sympy.diff ) fc，x，y ) )先对x
importsympyfd=sympy.e * * x3 * x * * 4x * *2print (sympy.integrate (FD，x ) ) #不定积分print (sympy.integrate ) )软盘， 求x )2) ) #定积分t=sympy.symbol(t ) ) ff=2*TFFF1=sympy.integrate ) ff，(t，0，x ) ) ff2=sympy.integrate