Find the surface area of the trapezoidal
1 answer:
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Answer:
Two rational roots: 1 and -1
Step-by-step explanation:
See the images for an explanation!
We can use the general term of the arithmetic series. Look:
Where:
: first term, 15.
: last term, 87.
n: number of terms (what we looking for);
r: reason, which is equal to the difference between two terms, that is, 3.
Let's go to the calculations.
There are 25 terms.