<p>A sequence of numbers is called <strong>arithmetic</strong> if it consists of at least two elements, and the difference between every two consecutive elements is the same. More formally, a sequence <code>s</code> is arithmetic if and only if <code>s[i+1] - s[i] == s[1] - s[0] </code>for all valid <code>i</code>.</p>
<p>For example, these are <strong>arithmetic</strong> sequences:</p>
<pre>
1, 3, 5, 7, 9
7, 7, 7, 7
3, -1, -5, -9</pre>
<p>The following sequence is not <strong>arithmetic</strong>:</p>
<pre>
1, 1, 2, 5, 7</pre>
<p>You are given an array of <code>n</code> integers, <code>nums</code>, and two arrays of <code>m</code> integers each, <code>l</code> and <code>r</code>, representing the <code>m</code> range queries, where the <code>i<sup>th</sup></code> query is the range <code>[l[i], r[i]]</code>. All the arrays are <strong>0-indexed</strong>.</p>
<p>Return <em>a list of </em><code>boolean</code><em>elements</em><code>answer</code><em>, where</em><code>answer[i]</code><em>is</em><code>true</code><em>if the subarray</em><code>nums[l[i]], nums[l[i]+1], ... , nums[r[i]]</code><em> can be <strong>rearranged</strong> to form an <strong>arithmetic</strong> sequence, and</em><code>false</code><em>otherwise.</em></p>
In the 0<sup>th</sup> query, the subarray is [4,6,5]. This can be rearranged as [6,5,4], which is an arithmetic sequence.
In the 1<sup>st</sup> query, the subarray is [4,6,5,9]. This cannot be rearranged as an arithmetic sequence.
In the 2<sup>nd</sup> query, the subarray is <code>[5,9,3,7]. This</code> can be rearranged as <code>[3,5,7,9]</code>, which is an arithmetic sequence.</pre>
