The numbers are a squence.
1) at highest point V = 0
<span>so 0 = Vo - gt </span>
<span>=> t = Vo / g = 26.8 / 9.81 = 2.73 s <<<<<<<<, </span>
<span>2) find its highest point : </span>
<span>V^2 = Vo^2 - 2gh </span>
<span>hence h = Vo^2 / 2g = 36.6 m from its starting point </span>
<span>so total height = 36.6 + 2.1 = 38.7 m </span>
<span>applying h = Vot + 1/2 g t^2 u get : </span>
<span>38.7 = 0 + 1/2 (9.81) t^2 </span>
<span>=> t = 2.8 s <<<<<<<<<</span>
There is no sum for this geometric series. it diverges rather than converges due to the absolute value of the common ratio (r), which is -3, being 3. for a geometric series to have a sum (to converge), the absolute value of r must be less than 1.
(you find r by dividing a2/a1, a3/a2, etc.)
hope this helps
(1.06)0 = 1 and positive powers of 1.06 are larger than 1, thus the minimum value N(t) attains, if t≥0, is 400.
From the point of view of the context, a CD account grows in value over time so with a deposit of $400 the value will never drop to $399.