Solution Bank Sequences and Series Target D
Answers to the Practice Problems are below in random order.
\(\begin{align}&64,32,16,8,4,2\ & \ \ \ &
\frac{3}{2}\ & \ \ \ &
\text{Geometric,}\ a_1=4, a_n=-2 a_{n-1}\\\\
&x \neq -3\ & \ \ \ &
4,11,18,25,32,39\ & \ \ \ &
\text{Arithmetic,}\ a_1=0, a_n=a_{n-1}+d\\\\
&x=7\ & \ \ \ &
1,1,2,3,5,8*\ & \ \ \ &
\text{Geometric,}\ a_1=3, a_n=4 a_{n-1}\\\\
&5,7,10,14,19,25\ & \ \ \ &
3, -5, -23, -55, -105, -177\ & \ \ \ &
\text{Arithmetic,}\ a_1=73, a_n=a_{n-1} -9\\\\
&5.016\ & \ \ \ &
\text{Option A by about}\ \$10\ & \ \ \ &
\text{Geometric,}\ a_1=1, a_n=r a_{n-1}\end{align}\)
*Fibonnaci, it's as easy as \(1,1,2,3...\)
Answers to the Practice Problems are below in random order.
\(\begin{align}&64,32,16,8,4,2\ & \ \ \ &
\frac{3}{2}\ & \ \ \ &
\text{Geometric,}\ a_1=4, a_n=-2 a_{n-1}\\\\
&x \neq -3\ & \ \ \ &
4,11,18,25,32,39\ & \ \ \ &
\text{Arithmetic,}\ a_1=0, a_n=a_{n-1}+d\\\\
&x=7\ & \ \ \ &
1,1,2,3,5,8*\ & \ \ \ &
\text{Geometric,}\ a_1=3, a_n=4 a_{n-1}\\\\
&5,7,10,14,19,25\ & \ \ \ &
3, -5, -23, -55, -105, -177\ & \ \ \ &
\text{Arithmetic,}\ a_1=73, a_n=a_{n-1} -9\\\\
&5.016\ & \ \ \ &
\text{Option A by about}\ \$10\ & \ \ \ &
\text{Geometric,}\ a_1=1, a_n=r a_{n-1}\end{align}\)
*Fibonnaci, it's as easy as \(1,1,2,3...\)