What is the equation for a geometric sequence with a first term of 4 and a second term of −8?
1 answer:
<h3>Answer:</h3>
The common ratio is -8/4 = -2. The general formula for the n-th term is ...
... an = a1·r^(n-1) . . . . . . note the use of the caret (^) and parentheses
For r = -2 and a1 = 4, this becomes ...
... an = 4·(-2)^(n-1) . . . . approximately matches the 2nd selection
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Hello!
<u><em>Answer:</em></u>
<u><em>n=-9</em></u>
<u><em>*The answer must have a negative sign.*</em></u>
Step-by-step explanation:
First, you subtract by 7 from both sides of an equation.
Then, you simplify.
Next, you divide by 2 from both sides of an equation.
And finally, simplify and solve. You can also dividing into the groups.
Hope this helps!
-Charlie
Have a great day!
Thanks!
:)
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