Question

问道求极限的题1 1 — — n n lim a +b n- -∞（ ————）=?n趋近于负无穷时,2分之a的开n次方

Answer 1

n→－∞,1/n→0,a^(1/n)→1,b^(1/n)→1,所以[a^(1/n)＋b^(1/n)]/2→1