Maxima:用定义替换函数 f(x)?

Maxima: replace function f(x) by its definition?

抱歉,我找不到任何相关信息。

如果我有带符号函数 f(x) 的表达式,现在我想用它的显式形式替换这些表达式 f(x) 怎么办?

例如:

我有

f(x):= x^2+sin(x)

并在分化

diff (%e**sqrt(f(x)*a), x,2);

我现在想用上面的表达式替换f(x)

谢谢

卡尔

(%i1) i: integrate(f(x)*f(4*x), x, 0, 1) $

(%i2) f(x):= x^2+sin(x) $

(%i3) ev(i, f);
                     1
                    /
                    [             2                  2
(%o3)               I  (sin(x) + x ) (sin(4 x) + 16 x ) dx
                    ]
                    /
                     0
 -- Function: ev (<expr>, <arg_1>, ..., <arg_n>)

     Evaluates the expression <expr> in the environment specified by the
     arguments <arg_1>, ..., <arg_n>.  The arguments are switches
     (Boolean flags), assignments, equations, and functions.  'ev'
     returns the result (another expression) of the evaluation.