Which of the following is the rule for the geometric sequence 1, 3, 9, 27, . . .?
1 answer:
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Work shown above! Answer is
a = 5 b = -2 c = 0
a = 5 b = -2 c = 0
We are given the inequality,
Now let us simplify this to get the value of a,
Adding 15 to both the sides,
So we have a>10 and a<17
One more thing that we need to look at is whether we will have close dots or open dots at 10 or 17.
If we have "=" sign along with inequality sign (≤ or ≥) then we use closed dot.
If we dont have "=" sign along with inequality sign (< or >) then we use open dot.
In our case we use open dot , since we dont have "=" sign.
So Answer will be option third, line starting from 10 to 17 with open dots at 10 and 17.