利用Wallis不等式正面回答了《大学数学》2016,32(1):101—104文末提出的猜想,并证明了该猜想的一个推广形式.
By using the Wallis inequality, we give a positive answer to a conjecture of the paper published in the journal of the "College Mathematics" 2016, 32 (1):101--104, moreover we obtain a general version of the conjecture.