Find the smallest positive integer n such that tn of the arithmetic sequence 20,19¼ ,18½ ,… is nagative
Pick
A) 27 B) 28 C) 29 D) 30 E) 31
Here we have , a= 20 = d = 19 ¼-20=-3/4   We	want	to	find	the	first	positive	integer	n such thattn&lt;0   20+(n-1)(-3/4)&lt;0   n&gt;27.33   hence, 28th term is first negative term   ANSWER 28 28
<result>B</result>
Find the smallest positive integer n such that tn of the arithmetic sequence 20,19¼ ,18½ ,… is nagative