观察下列各式:2×5,-4×5^2,6×5^3,-8×5^4,10*5^5,-12×5^6 (1)写出第n个式子;(2)写出第2010个
问题描述:
观察下列各式:2×5,-4×5^2,6×5^3,-8×5^4,10*5^5,-12×5^6 (1)写出第n个式子;(2)写出第2010个
答
(-1)^(n+1)*2n*5^n
观察下列各式:2×5,-4×5^2,6×5^3,-8×5^4,10*5^5,-12×5^6 (1)写出第n个式子;(2)写出第2010个
(-1)^(n+1)*2n*5^n