Hi there! :)
Looking at the graph, the minimum y-value is the lowest point on the graph, or y = -2.
Find the x-value that corresponds to this y-coordinate:
f(x) = -2
f(-3) = -2
Therefore, the answer is B) -3.
The answer is x= 9 or x=-15
The sum of any geometric sequence, (technically any finite set is a sequence, series are infinite) can be expressed as:
s(n)=a(1-r^n)/(1-r), a=initial term, r=common ratio, n=term number
Here you are given a=10 and r=1/5 so your equation is:
s(n)=10(1-(1/5)^n)/(1-1/5) let's simplify this a bit:
s(n)=10(1-(1/5)^n)/(4/5)
s(n)=12.5(1-(1/5)^n) so the sum of the first 5 terms is:
s(5)=12.5(1-(1/5)^5)
s(5)=12.496
as an improper fraction:
(125/10)(3124/3125)
390500/31240
1775/142
Answer:
A, 2 is the y intercept not the zero