If 1 + 9r2 + 81r4 = 256 and 1 + 3r + 9r2 = 32, then find the value of 1 - 3r + 9r2.

Answer: Option A

1 + 9r² + 81r⁴ = 256
1 + 3r + 9r² = 32
So, 1 - 3r + 9r² $$=\frac{256}{32}=8$$