Answer:
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Step-by-step explanation:
It is a Geometric Progression with common ratio :
= 162/486 = 1/3
So, Next term would be: 6 * 1/3 = 2
In short, Your Answer would be 2
Hope this helps!
Answer:
it's 11.
Step-by-step explanation:
15(11)= 165. It's also 4 less than 15, which is the length.
The answer would be 1/7 in fraction form , and 0.142857 in decimal form. hope this helps!
6 - 34 + 96 - 384 +...
a 1 = 6 , a 2 = a 1 * ( - 4 ) , a 3 = a 2 * ( - 4 ), a 4 = a 3 * ( - 4)...
a 5 = - 384 * ( - 4 ) = 1,536
a 6 = 1536 * ( - 4 ) = - 6,144
a 7 = - 6,144 * ( - 4 ) = 24,576
This is a sum of a geometric sequence:
S 7 = 6 - 24 + 96 - 384 + 1,536 - 6,144 + 24,576 = 19,662
Another way to solve this:
S 7 = a 1 * ( r^n - 1) / ( r - 1 ) = 6 * (( - 4) ^7 - 1 )/ (- 4 - 1)=
= 6 * (-16,385) / (-5 ) = 19,662