\( n ( A \cup B ) = n ( A ) + n ( B ) - n ( A n B ) \)

I) \( (3 x+1)(x+3)=1 \)

3 Some diseases are caused by infection with different organisms. (a) Influenza (flu) is caused by a virus. Complete the sentences. The influenza virus is passed from the first host to a second ho The virus travels in the air when the first host The second host knows they have the virus because they fee

\( \frac{d}{dx}((1-e^{2^{x}})^{\frac{-1}{2}} \)

1. Diketahui \( A=\left[\begin{array}{lll}2 & 1 & 3 \\ -4 & 5 & 2 \\ 3 & 4 & 1\end{array}\right] \quad \) dan \( B=\left[\begin{array}{lll}-5 & 2 & 3 \\ 2 & 4 & -5 \\ 1 & 3 & 4\end{array}\right] \) Tentukan hasil dari a. \( 3 A-2 B \) b. \( 4 A+B \) c. \( A B \)

\[ g(x)=\left\{\begin{array}{ll}x+5 & \text { if } x \geq-5 \\ -(x+5) & \text { if } x<-5\end{array}\right. \] \( \begin{array}{l}\text { a. } g(0) \\ \text { b. } g(-8) \\ \text { c. } g(-5)\end{array} \) a. \( g(0)=\square \) b. \( g(-8)=\square \) c. \( g(-5)=\square \)