Question
Evaluate the following limit:
$\lim\limits_{\text{x}\rightarrow0}\frac{9^\text{x}-2.6^\text{x}+4^\text{x}}{\text{x}^2}$
$\lim\limits_{\text{x}\rightarrow0}\frac{9^\text{x}-2.6^\text{x}+4^\text{x}}{\text{x}^2}$
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$R_8=\{(a, b) / b=a+2, a \in Z, 0<a<5\}$
$\frac{1}{n !}-\frac{1}{(n-1) !}-\frac{1}{(n-2) !}$