<h3> Answer:</h3><h3>The simplest form of 477/636 is 3/4.</h3><h3>The simplest form of 361/418 is 19/22</h3>
Hello,
Answer B
y=-x^4+1
y'=-4x^3
y"=-12x² is always <0 : concavity downside.
There is no answer correct in this question so just check the question first