Which of the following infinite series has a finite sum? Explain your reasoning.
1 answer:
Answer:
d. 20+10+5+2.5+...
Step-by-step explanation:
No geometric series with a common ratio of magnitude greater than 1 will have a finite sum. Nor will any arithmetic series.
Those descriptions exclude answer choices a, b, c. Choice d is a geometric series with a common ratio of 1/2, so will have a finite sum. (It is 40.)
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Answer:
f (-2)=5×-2+4
= -10+4
= -6
f (3)=5×3+4
=15+4
=19
f (5)=5×5+4
25+4
=29
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8c + 6-3c -2
8c -3c + 6-2 = 5c + 4
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Answer:
Step-by-step explanation:
9x + 1 + 7x - 9 = 5x - 11
16x - 8 = 5x - 11
11x - 8 = -11
11x = -3
-3/11 = x
