please no answers like "i dont know" i came here for help not sarcasim please
2007-07-13 11:55:07 · 8 answers · asked by °†¿ÐámñéÐ?†° 2 in Science & Mathematics ➔ Mathematics
those who answered 25 -100x15 are wrong and here is the proof:
25,10,-5,-20
F(1) = 25
F(2) = 25 - 15 = 10
F(3) = 25 - 15x2 = 5
F(4) = 25 - 15x3 = -20
F(n) = 25 - 15x(n-1)
==> F(100) = 25 - 15x(100 - 1) = 25 -15x99
= 25 - 1485 = -1460
2007-07-14 01:51:56 · answer #1 · answered by aspx 4 · 0⤊ 0⤋
Let 100th term = u 100
u 100 = a + 99 d
where a = 25 and d = - 15
u 100 = 25 - (99 x 15)
u 100 = - 1460
2007-07-17 10:07:49 · answer #2 · answered by Como 7 · 0⤊ 0⤋
1) 25
2) 10
3) -5
4) -20
you subtract 15 each time. so basically, since you are looking for the 100th term, you will minus 15 100 times. so it would be 15 x 100 = 1500 below zero, but you started at 25. So you add 25 to -1500. It becomes 1475.
2007-07-13 18:58:22 · answer #3 · answered by MathMaelstrom 1 · 0⤊ 1⤋
Just keep adding -15 until you reach the 100th term.
2007-07-13 18:59:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋
25 + (-15)100.
2007-07-13 18:58:17 · answer #5 · answered by alwaysmoose 7 · 0⤊ 1⤋
Do your own homework - pay more attention in class.
2007-07-13 18:58:12 · answer #6 · answered by Trapped 5 · 0⤊ 1⤋
25-(100x-15)
2007-07-13 18:58:38 · answer #7 · answered by Anonymous · 0⤊ 1⤋
i dont know
2007-07-13 18:57:09 · answer #8 · answered by Borat 2 · 0⤊ 1⤋