<p>Two iron solid discs of negligible thickness have radii&nbsp;<span class="equation">\(R_1\)</span>&nbsp;and&nbsp;<span class="equation">\(R_2\)</span>&nbsp;and moment of intertia <span class="equation">\(I_1\)</span>&nbsp;and&nbsp;<span class="equation">\(I_2\)</span>&nbsp;respectively. For <span class="equation">\(R_2=2R_1\)</span>, the ratio of <span class="equation">\(I_1\)</span>&nbsp;and&nbsp;<span class="equation">\(I_2\)</span>​​​​​​​ would be 1/x, where x = ____​​​​​​​​​​​​​​</p>