A sequence $(a_1,b_1)$, $(a_2,b_2)$, $(a_3,b_3)$, $\ldots$ of points in the coordinate plane satisfies
\[(a_{n + 1}, b_{n + 1}) = (\sqrt {3}a_n - b_n, \sqrt {3}b_n + a_n)\]for $n = 1,2,3,\ldots$.  Suppose that $(a_{100},b_{100}) = (2,4)$. What is $a_1 + b_1$?  Express your answer using exponential notation.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A sequence $(a_1,b_1)$, $(a_2,b_2)$, $(a_3,b_3)$, $\ldots$ of points in the coordinate plane satisfies
\[(a_{n + 1}, b_{n + 1}) = (\sqrt {3}a_n - b_n, \sqrt {3}b_n + a_n)\]for $n = 1,2,3,\ldots$.  Suppose that $(a_{100},b_{100}) = (2,4)$. What is $a_1 + b_1$?  Express your answer using exponential notation.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{1}{2^{98}}
A sequence $(a_1,b_1)$, $(a_2,b_2)$, $(a_3,b_3)$, $\ldots$ of points in the coordinate plane satisfies
\[(a_{n + 1}, b_{n + 1}) = (\sqrt {3}a_n - b_n, \sqrt {3}b_n + a_n)\]for $n = 1,2,3,\ldots$.  Suppose that $(a_{100},b_{100}) = (2,4)$. What is $a_1 + b_1$?  Express your answer using exponential notation.
train