<p>Heyy.</p>
<p>On the OG Blue Book I don't get page 367 #3, #12. Can anyone please explain!</p>
<p>Thanks!! (:</p>
<p>The answer is C.</p>
<p>f(x)=f(-x) –> the graph must take Oy as the reflectional axis.</p>
<p>Thanks!! </p>
<p>Can anyone help me on question 12? XDD Thanks!!</p>
<p>Also, f(x)=f(-x) mean even functions right??</p>
<p>How about odd functions? Does it reflect about the x axis?</p>
<p>Thanks!</p>
<p>mind typing it out?</p>
<ol>
<li><p>The answer for #12 is D.
Area of small shaded ring = Pi (2^2-1^2) = 3 Pi
Area of large shaded ring = Pi (4^2-3^2) = 7 Pi
===> ratio 3:7</p></li>
<li><p>Even functions take Oy as the reflectional axis.
Odd functions, however, take O as the reflectional centre.</p></li>
</ol>
<p>i get it now thanks!!!</p>
<p>i would’ve typed it out but theres both has graph and i dont know how to draw them</p>
<p>Thanks guys!!</p>
<p>I meant to type the questions out for anhtimmy also, but then I realized that I couldn’t draw such graphs 
Terribly sorry</p>