Question

Find a formula for tn so that the first four terms are 15, 25, 35, 45.
A. tn = 15n
B. tn = 10n - 5
C. tn = 10n + 5
D. tn = 15n - 5

Answer 1

The answer would be C.
N is the number of the term you are trying to find, so using the equation in choice C, tn = 10n +5, you can fill in the number of the term you are trying to find in for n.
First term, (1) = 10(1)+5 = 15
10(2)+5 = 25
10(3)+5=35
10(4)+5=45
The fifth term would then be 55.

Answer 2

im so glad you explained it because for some reason i never get it

Answer 3

Find the first four terms of the given sequence tn = (-1)n(n).
A. -1, -2, -3, -4
B. -1, 2, -3, 4
C. 1, ½, 2/3, ¾
D. 1, 2, 3, 4
be my helping buddy im taking a test for summer school