Consider the trapezoidal numbers 1+1+1, 1+2+2+2+1,

Last updated: 7/26/2022

Consider the trapezoidal numbers 1+1+1, 1+2+2+2+1, 1+2+3+3+3+2+1,... The nth trapezoidal number is 1+2+...+n+n+n+...+2+1 where n is a positive integer. Complete parts (a) through (c) below.