a. \( 4 y^{3}\left(-y^{3}\right) \) b. \( 4 y^{3}-y^{3} \) c. Explain the cifference between the two expressions.

0. Sabe-se que \( x=\sqrt{\frac{1,69}{1,44}} \) e \( y=\sqrt{\frac{0,81}{0,04}} \) Determine \( x: y \).

Determine the location and value of the absolute extreme values of \( f \) on the given interval, if they exist. \( f(x)=-x^{2}+9 \) on \( [-3,4] \) What is/are the absolute maximum/maxima of \( f \) on the given interval? Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. The absolute maximum/maxima is/are (Use a comma to separate answers as needed.) B. There is no absolute maximum of \( f \) on the given interval.

ción \( y=x^{2}-4 x-5 \) en el punto \( (-2,7) \)

Let \( A=\{2,4,6,7,8,9\}, B=\{1,3,5,6,10\} \) and \( C=\{x \mid \in \mathbb{Z}, 3 x+6=0 \) or \( 2 x+6=0\} \) Find a) \( A \cup B \) \( \quad \) b) Is \( (A \cup B) \cup C=A \cup(B \cup C) \) ?

Find the critical points of \( f \). Assume \( a \) is a constant. \( f(x)=\frac{1}{15} x^{15}-a^{14} x \)