i) Find the coeficient of 1/x⁵ in the expansion of (2x + 1/x)⁷
ii) Find the term which is independant of x in the expansion of (x² - 1/x)⁹
im in grade 11 and have an exam in 3 days. I tried to do them but get stuck or get a totally wrong answer!
i) Find the coeficient of 1/x⁵ in the expansion of (2x + 1/x)⁷
ii) Find the term which is independant of x in the expansion of (x² - 1/x)⁹
im in grade 11 and have an exam in 3 days. I tried to do them but get stuck or get a totally wrong answer!