Solve for a1 a_1=4*(-5)^(1-1)

$a_{1} = 4 \cdot {(- 5)}^{1 - 1}$

Step 1

Subtract $1$ from $1$ .

$a_{1} = 4 \cdot {(- 5)}^{0}$

Step 2

Anything raised to $0$ is $1$ .

$a_{1} = 4 \cdot 1$

Step 3

Multiply $4$ by $1$ .

$a_{1} = 4$