3) Calcular usando la mayor cantidad de propiedades posible. a) \( \log _{2} \frac{1}{8}+\log _{3} \sqrt{27}-\ln 1 \) b) \( \log _{2} 32+\log _{3} \sqrt[3]{81}-\ln \left(\frac{1}{e^{2}}\right) \)

Find the recursive formula for the arithmetic sequence \( 7,5,3,1,-1, \ldots \) \( a_{1}=7, a_{n}=-2 a_{n-1} \) \( a_{1}=7, a_{n}=a_{n-1}+2 \) \( a_{1}=7, a_{n}=2 a_{n-1} \) \( a_{1}=7, a_{n}=a_{n-1}-2 \)

¿Cuál es el y-intercepto de la función exponencial \( f(x) = 2^x \)?

One whole \( =\frac{3}{8}+\square \)

Simplify the expression. \( -19+\left(\frac{-4.5+6.87}{3}\right) \cdot 5^{2}-7.3 \)

Given the recursive formula for the arithmetic sequence \( a_{1}=-5, a_{n}=a_{n-1}+4 \), find the first three terms of the sequence. ( 2 points) \( a_{1}=\square, a_{2}=\square \), and \( a_{3}= \)