Answer:
63
Step-by-step explanation:
Each term in a geometric sequence progresses by multiplying a constant (let us name it <u>r</u>).
Let us<u> solve for this constant</u> r in order to find the 13th term.
If the seventh term is 7, the tenth term would be 7*r*r*r, or . We also happen to know that the 10th term is 21. Let us make a <u>new equation</u>:
or, approx. 1.442249570307408
Using the same logic, the 13th term would be 7*r*r*r*r*r*r, or . We may now <u>substitute</u> what we know, r, into this expression to obtain the 13th term:
Therefore, the 13th term of this progression is 63.
<em>I hope this helps! Please let me know if you have any further questions :)</em>
Fourth root of 81 = 3
fourth root of 16 = 2
so it must be one of the ones with 3/2 in front.
you would divide all of the exponents by whatever the root is, in this case 4.
8/4 = 2
12/4 = 3
16/4 = 4
answer is A
The correct answer should be 280 if not I'm srry
Answer:
I am answering this for points but i wish i knew so i could help you out
Step-by-step explanation:
but just put seven and hope for the best