下列说法正确的个数是
\(①4\)个不同的小球放入\(3\)个不同的盒中且每个盒中不空的放法总数为\(A_{4}^{2}×3=72 \)种;
\(②\)“在\(\triangle \)\(ABC\)中,若\(\sin A\)\( > \)\(\sin B\),则\(A\)\( > \)\(B\)”的逆命题是假命题;
\(③\)“三个数\(a\),\(b\),\(c\)成等比数列”是“\(b\)\(=\sqrt{ac}\)”的既不充分也不必要条件;
\(④\)命题“\(∀\)\(x\)\(∈\)\(R\),\(x\)\({\,\!}^{3}-\)\(x\)\({\,\!}^{2}+1\leqslant 0\)”的否定是“\(∃\)\(x\)\({\,\!}_{0}∈\)\(R\),\(x\)\({\,\!}_{0}^{3}-\)\(x\)\({\,\!}_{0}^{2}+1 > 0\)”.