can any one tell me how to do this question?
in a arithmetic sequence a15=17 and a27=13 find a88
can any one explain this question step by step? and give the formula too?
2006-11-14 12:40:28 · 6 answers · asked by Jason Z 3 in Education & Reference ➔ Homework Help
if I read you right...
as "a" increases by 12, its numeric value decreases by 4.
therefore, dividing each by 4, as "a" increases by 3, its numeric value should drop by 1.
subtracting a27 (the highest "a" for which we have a given nuumeric value) from a88, we get a61. a60 should equal -20, so a61 would be -20.3333 (negative 20 and a third)
adding that to 13 (the numberic value of a27), we get -7.3333 (negative seven and one third).
2006-11-14 12:50:04 · answer #1 · answered by kent_shakespear 7 · 2⤊ 0⤋
Don't you have a book that teaches you that?
2006-11-14 12:41:51 · answer #2 · answered by Kayla [(Adam)] 4 · 0⤊ 1⤋
You sure you got the ? right
2006-11-14 12:42:20 · answer #3 · answered by Up your Maslow 4 · 0⤊ 2⤋
move your queen to E4
2006-11-14 12:41:35 · answer #4 · answered by Anonymous · 0⤊ 2⤋
i'm not sure. have you tried google?
2006-11-14 12:42:36 · answer #5 · answered by Anonymous · 0⤊ 1⤋
um no i cant... i hate math lol
2006-11-14 12:43:11 · answer #6 · answered by Anonymous · 0⤊ 1⤋