给出以下四个命题:
\(①\)动点\(P\)到两定点\({F}_{1}\left(-2,0\right),{F}_{2}\left(2,0\right) \)的距离之和为\(4\),则点\(P\)的轨迹为椭圆;
\(②P\)为抛物线\({{y}^{2}}=4x\)上一点,\(F\)为焦点,定点\(A\left(2,1\right) \),则\(\left| PF \right|+\left| PA \right|\)的最小值\(3\);
\(③\)函数\(f(x)=x\cos x-\sin x\)在\(\left(π,2π\right) \)上单调递增;
\(④\)定义在\(R\)上的可导函数\(f(x) \)满足\(f{{{'}}}\left(1\right)=0 \),\(\left(x-1\right)f{{{'}}}\left(x\right) > 0 \),则\(f(0)+f(2) > 2f(1)\)
一定成立\(.\)其中,所有真命题的序号是 .