Write a recursive formula and an explicit formula for the following arithmetic sequence. -2, 1, 4, 7, 10, ...
II.
A recursive formula is a, =. a, = 0

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

answer: b.36 feet

step-by-step explanation: