bjr
f x 2ⁿ⁺⁵ - 10 x 2ⁿ = 2ⁿ⁺²
f x 2ⁿ⁺⁵ = 10 x 2ⁿ + 2ⁿ⁺²
f x 2ⁿ⁺⁵ = 5 x 2 x 2ⁿ + 2ⁿ⁺²
f x 2ⁿ⁺⁵ = 5 x 2ⁿ⁺¹ + 2 x 2ⁿ⁺¹
f x 2ⁿ⁺⁵ = (5 + 2) x 2ⁿ⁺¹
f x 2ⁿ⁺⁵ = 7 x 2ⁿ⁺¹
f = 7 x 2ⁿ⁺¹ / 2ⁿ⁺⁵
f = 7 / 2⁴
f = 7 / 16
