a)1,4,9,16,25,., b)1/2,1/6,1/12,1/20,1/30,1/42,..,
2From the statement ,''each term is equal to the sum of the square of the term number and the term number'',a)what is the general term?b)waht is the sum of the first two terms?c)Guess which term has a value of 110.
更新1:
SORRY,,, 第2題係: From the statement ,''each term is equal to the sum of the square of the term number and the term number",a)what is the general term?b)waht is the sum of the first two terms?c)Guess which term has a value of 110.