Given that ${\displaystyle \underset{n=1}{\overset{}{}}}{a}_n=2,{\displaystyle \underset{n=1}{\overset{}{}}}{b}_n=-2,a_1=-3,$

and $b_1=-2,$ find the values $of$ the following

series.

${\displaystyle \underset{n=1}{\overset{}{}}}(a_n+b_n)=$

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$(numbers)$

${\displaystyle \underset{n=1}{\overset{}{}}}(a_n+2b_n)=$

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$(numbers)$

${\displaystyle \underset{n=2}{\overset{}{}}}(a_n-b_n)=$

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$(numbers)$

${\displaystyle \underset{n=1}{\overset{}{}}}(-2a_{n+1}-4b_{n+1})=$

help $(numbers)$