Math Problem Statement
Evaluate the summation ∑ (3 × 2^(i-1)) from i=1 to 10. Give an exact answer, do not round.
Solution
To solve the given summation:
We can factor out the constant from the summation:
This expression is now a geometric series, where the first term and the common ratio . The number of terms .
The sum of the first terms of a geometric series is given by:
Substituting the values:
Calculate :
So,
Thus, the sum of the series is:
So, the exact answer is .
Would you like more details or have any questions?
Here are five related questions to consider:
- How would the result change if the summation limit was from to ?
- What if the common ratio was instead of ?
- How do you derive the formula for the sum of a geometric series?
- What is the effect of multiplying the series by a constant, as done in this problem?
- How would you solve this problem if the exponent was instead of ?
Tip: When dealing with geometric series, always identify the first term and common ratio before applying the summation formula.
Ask a new question for Free
By Image
Drop file here or Click Here to upload
Math Problem Analysis
Mathematical Concepts
Geometric Series
Algebra
Summation
Formulas
Sum of a geometric series: S_n = a * (r^n - 1) / (r - 1)
Theorems
Geometric Series Theorem
Suitable Grade Level
Grades 9-12