Which series has a sum of 20?
1 answer:
Answer:
see below
Step-by-step explanation:
The sum of an infinite series with first term "a" and common ratio "r" is ...
S = a/(1 -r) . . . . . for |r| < 1
Then the sums for the given answer choices are ...
A: 5/(1 -3/4) = 20 . . . . . the answer of choice
B: 4/(1 -5/6) = 24
C: 4/(1 -1/5) = 5
D: 10/(1 -1/5) = 12.5
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Answer:
find the value of x that makes the denominator zero: x = 7
Step-by-step explanation:
A vertical asymptote shows up where the denominator is zero. As the denominator gets closer to zero, the function value gets larger without bound (unless there is a numerator factor that cancels the one in the denominator).
To find the value of x at the vertical asymptote, solve the equation ...
denominator = 0
x - 7 = 0
x = 7 . . . . . . . add 7 to both sides
