
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Among the following functions: \\(①f(x)=3^{|x|}\\), \\(②f(x)=x^{3}\\), \\(③f(x)=\\ln \\dfrac {1}{|x|}\\), \\(④f(x)=x^{ \\frac {4}{3}}\\), \\(⑤f(x)=-x^{2}+1\\), identify the function(s) that is both an even function and a monotonically decreasing function in the interval \\((0,+∞)\\). Write down the serial number(s) of the function(s) that meet the requirement.

Present the answer in LaTex format: \boxed{Your answer}
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