PLEASE HELP PRE CALCLUS
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Answer:
6
Step-by-step explanation:
The correct notation is: Summation from n = 1 to infinity of the expression:
If we expand this notation, we will find that the given summation represent the terms of a G.P and we have to find the sum of infinite terms of a G.P. By placing n=1,2,3,4,... we can find the first few terms as shown below:
Its obvious from the above result, that the given summation represent a G.P with first term equal to 4 and common ratio of 1/3. The formula of infinite G.P is:
Using the value of a1 = 4 and r = 1/3 we can calculate the given summation
Therefore, the given summation is equal to 6.