6.
已知幂函数\(f(x)=(m^{2}+m-1)x^{-2m^{2}+m+3}\)在\((0,+∞)\)上为增函数,\(g(x)=-x^{2}+2|x|+t\),\(h(x)=2^{x}-2^{-x}\)
\((1)\)求\(m\)的值,并确定\(f(x)\)的解析式;
\((2)\)对于任意\(x∈[1,2]\),都存在\(x_{1}\),\(x_{2}∈[1,2]\),使得\(f(x)\leqslant f(x_{1})\),\(g(x)\leqslant g(x_{2})\),若\(f(x_{1})=g(x_{2})\),求实数\(t\)的值;
\((3)\)若\(2^{x}h(2x)+λh(x)\geqslant 0\)对于一切\(x∈[1,2]\)成成立,求实数\(λ\)的取值范围.