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# Python | sympy.logcombine() method

• Last Updated : 25 Jun, 2019

With the help of `sympy.logcombine()`, we can combine the log terms in the mathematical expression by using the following properties that are listed below.

Properties :
1) log(x*y)=log(x)+log(y)
2) log(x**n)=nlog(x)

Syntax : `sympy.logcombine()`

Return : Return the simplified mathematical expression.

Example #1 :
In this example we can see that by using `sympy.logcombine()`, we are able to combine the log terms in mathematical expression.

 `# import sympy``from` `sympy ``import` `*` ` ` `x, y, z ``=` `symbols(``'x y z'``, positive ``=` `True``)``gfg_exp ``=` `log(x) ``+` `log(y)``   ` `# Using sympy.logcombine() method``gfg_exp ``=` `logcombine(gfg_exp)``   ` `print``(gfg_exp)`

Output :

log(x*y)

Example #2 :

 `# import sympy``from` `sympy ``import` `*` ` ` `x, y, z ``=` `symbols(``'x y z'``, positive ``=` `True``)``gfg_exp ``=` `5` `*` `log(x)``   ` `# Using sympy.logcombine() method``gfg_exp ``=` `logcombine(gfg_exp)``   ` `print``(gfg_exp)`

Output :

log(x**5)

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