-5, -1, 3, 7, 11, 15
2006-08-27 16:45:01 · 4 answers · asked by bobthefrog1114 2 in Science & Mathematics ➔ Mathematics
-5, -1, 3, 7, 11, 15
-5 is the first term
2006-08-27 17:28:59 · update #1
To Find the nth term we use the formula
Tn=a+(n-1)d
where
a = first term
n = number of term
d = difference
and
Tn = nth term
therefore
Tn=(-5)+(n-1)(+4)
Tn=(-5)+4n-4
Tn=4n-9
--------------------
CHECK:
--------------------
for n=1, Tn= 4(1)-9 = 4-9 = -5
for n=2, Tn= 4(2)-9 = 8-9 = -1
for n=3, Tn= 4(3)-9 = 12-9 = 3
for n=4, Tn= 4(4)-9 = 16-9 = 7
.....................
.....................
.....................
2006-08-28 01:06:02 · answer #1 · answered by true_flower 1 · 0⤊ 0⤋
Assuming -5 is the first term, then
1st term = -9 + 4 = -9 + 1 x 4
2nd term = -9 + 8 = -9 + 2 x 4
3rd term = -9 + 12 = -9 + 3 x 4
...
nth term = -9 + 4n
2006-08-28 00:03:38 · answer #2 · answered by back2nature 4 · 0⤊ 0⤋
27
2006-08-27 23:52:47 · answer #3 · answered by swim chick 3 · 0⤊ 0⤋
if -5 is the zeroth term then:
-5+4n will give you the nth term.
2006-08-27 23:57:09 · answer #4 · answered by harsh_bkk 3 · 0⤊ 0⤋