How many n?

1 ⤊

if n1, n2 , n3 , ... , nn
-8 , -2 , 4 , ... , 40
pleasefind for me n . thanks you so much.

2006-09-07 08:38:10 · 4 answers · asked by Asker 1 in Science & Mathematics ➔ Mathematics

well dear lili

a= -8 , d = -2-(-8) = 6 , l = 40
l = a+(n-1)d
40 = -8+(n-1) * 6
n-1 = 8
n = 9
there 9 n in this string.
Good Luck.

2006-09-07 08:45:23 · answer #1 · answered by sweetie 5 · 1⤊ 0⤋

2006-09-07 15:39:22 · answer #2 · answered by Rez 5 · 0⤊ 0⤋

40=-8+(n-1)6
48=6n-6
6n=54
n=9

2006-09-07 15:47:26 · answer #3 · answered by raj 7 · 0⤊ 0⤋

do[n]tu[n]dersta[n]dyourquestio[n]

2006-09-07 15:40:32 · answer #4 · answered by shih rips 6 · 0⤊ 1⤋