Join the conversation on IDNLearn.com and get the answers you seek from experts. Find the solutions you need quickly and accurately with help from our knowledgeable community.

what is the sum of a 7 term geometric series if the first term is 6 the last term is -24576 and the common ratio is -4

Sagot :

Answer:

Sum = 19,662

Step-by-step explanation:

Given that this is a finite geometric series (meaning it stops at a specific term or in this case -24,576), we can use this formula:  

[tex]\frac{a(1-r^n)}{1-r}[/tex], where a is the first term, r is the common ratio, and n is the number of terms.

Substituting for everything and simplifying gives us:

[tex]\frac{6(1-(-4)^7)}{1-(-4)} \\\\\frac{6(16385}{5}\\ \\\frac{98310}{5}\\ \\19662[/tex]