Basic Math Examples

$8 \cdot 2^{n - 1} - 1$

Step 1

Rewrite $8$ as $2^{3}$ .

$2^{3} \cdot 2^{n - 1} - 1$

Step 2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$2^{3 + n - 1} - 1$

Step 3

Subtract $1$ from $3$ .

$2^{n + 2} - 1$