? asked in 科學及數學數學 · 1 decade ago

奧林匹克數學

對於任意的兩個自然數a 和 b, 規定新運算 “#” 為 :

a#b=a(a+1)(a+2)......(a+b-1)

如果(x#3)#2=3660,那麼x等於多少 ?

急用!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

2 Answers

Rating
Still have questions? Get your answers by asking now.