Simplify i^7

$i^{7}$

Step 1

Rewrite $i^{7}$ as $i^{4} (i^{2} \cdot i)$ .

Factor out $i^{4}$ .

$i^{4} i^{3}$

Factor out $i^{2}$ .

$i^{4} (i^{2} \cdot i)$

$i^{4} (i^{2} \cdot i)$

Step 2

Rewrite $i^{4}$ as $1$ .

Rewrite $i^{4}$ as ${(i^{2})}^{2}$ .

${(i^{2})}^{2} (i^{2} \cdot i)$

Rewrite $i^{2}$ as $- 1$ .

${(- 1)}^{2} (i^{2} \cdot i)$

Raise $- 1$ to the power of $2$ .

$1 (i^{2} \cdot i)$

$1 (i^{2} \cdot i)$

Step 3

Multiply $i^{2} \cdot i$ by $1$ .

$i^{2} \cdot i$

Step 4

Rewrite $i^{2}$ as $- 1$ .

$- 1 \cdot i$

Step 5

Rewrite $- 1 i$ as $- i$ .

$- i$

Related Questions