Solve for a5 a_5=5*2^(5-1)

$a_{5} = 5 \cdot 2^{(5 - 1)}$

Subtract $1$ from $5$ .

$a_{5} = 5 \cdot 2^{4}$

Raise $2$ to the power of $4$ .

$a_{5} = 5 \cdot 16$

Multiply $5$ by $16$ .

$a_{5} = 80$

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