If \, a^0 + a^1 + a^2 = ?

For real $$a\ne 0$$, compute $$a^0 + a^1 + a^2$$.

Options

1. \( 1 + a + a^2 \)
2. \( a^3 \)
3. \( (a^3 - 1)/(a-1) \)
4. 0

Answer

Solution