𝐶 = 6 ∶ 1 and 𝑛 + 1 0 𝑟 − 1 1 𝑛 + 1 0 𝑟 − 1 0 𝐶 + 𝐶 = 3 3 6 4 9 , find 𝑛 and 𝑟 .
find all of the possible values of 𝑛 , given that 4 × 𝐶 = 3 × 𝐶 + 2 × 𝐶 𝑛 5 𝑛 6 𝑛 4 .
given that 𝑛 𝑟 𝑛 𝑟 + 1 𝑛 𝑟 𝐶 + 𝐶 𝐶 = 𝑛 + 1 𝑟 + 1 and 𝑛 2 1 𝑛 2 2 𝑛 2 1 𝐶 + 𝐶 𝐶 = 3 2 , find 𝑛 .
if 𝑛 4 2 𝑛 