Binomial theorem/Series
I need help with questions 7 and 18.
How does one solve these? I multiplied (1+x)³⁰ and (1-x)³⁰ for Q7, but got stuck midway. For Q18, I got 0, but the answer is -30C15. Idk where I went wrong.
How does one solve these? I multiplied (1+x)³⁰ and (1-x)³⁰ for Q7, but got stuck midway. For Q18, I got 0, but the answer is -30C15. Idk where I went wrong.
