Math Problem Statement

Evaluate the summation: \( \sum_{i=1}^{10} (3i^3 - 5) \)

Solution

The given image shows a summation notation:

i=110(3i35)\sum_{i=1}^{10} (3i^3 - 5)

This represents the sum of the expression 3i353i^3 - 5 as ii runs from 1 to 10. Let’s break this down step-by-step:

  1. For i=1i = 1, the expression is: 3(13)5=3(1)5=35=23(1^3) - 5 = 3(1) - 5 = 3 - 5 = -2

  2. For i=2i = 2, the expression is: 3(23)5=3(8)5=245=193(2^3) - 5 = 3(8) - 5 = 24 - 5 = 19

  3. For i=3i = 3, the expression is: 3(33)5=3(27)5=815=763(3^3) - 5 = 3(27) - 5 = 81 - 5 = 76

  4. For i=4i = 4, the expression is: 3(43)5=3(64)5=1925=1873(4^3) - 5 = 3(64) - 5 = 192 - 5 = 187

  5. For i=5i = 5, the expression is: 3(53)5=3(125)5=3755=3703(5^3) - 5 = 3(125) - 5 = 375 - 5 = 370

  6. For i=6i = 6, the expression is: 3(63)5=3(216)5=6485=6433(6^3) - 5 = 3(216) - 5 = 648 - 5 = 643

  7. For i=7i = 7, the expression is: 3(73)5=3(343)5=10295=10243(7^3) - 5 = 3(343) - 5 = 1029 - 5 = 1024

  8. For i=8i = 8, the expression is: 3(83)5=3(512)5=15365=15313(8^3) - 5 = 3(512) - 5 = 1536 - 5 = 1531

  9. For i=9i = 9, the expression is: 3(93)5=3(729)5=21875=21823(9^3) - 5 = 3(729) - 5 = 2187 - 5 = 2182

  10. For i=10i = 10, the expression is: 3(103)5=3(1000)5=30005=29953(10^3) - 5 = 3(1000) - 5 = 3000 - 5 = 2995

Now, let's compute the total sum of all these values:

2+19+76+187+370+643+1024+1531+2182+2995-2 + 19 + 76 + 187 + 370 + 643 + 1024 + 1531 + 2182 + 2995

I'll calculate the result.The total sum of the expression i=110(3i35)\sum_{i=1}^{10} (3i^3 - 5) is:

90259025

Would you like more details or have any other questions?

Here are 5 related questions to expand your understanding:

  1. What happens if we change the limits of the summation to a different range, say from 1 to 15?
  2. How would the result change if the cubic term i3i^3 were replaced with i2i^2 (a quadratic term)?
  3. How do we calculate the sum of cubes from 1 to nn, and can that help simplify summations like this?
  4. What other mathematical operations can be easily performed using summation notation?
  5. How does the general behavior of cubic functions influence the growth of the sum?

Tip: When dealing with summations involving powers of ii, patterns often emerge for specific ranges of ii, which can sometimes lead to simplifications using known formulas.

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Math Problem Analysis

Mathematical Concepts

Summation
Algebra
Cubic Functions

Formulas

Summation notation \( \sum \)
Cubic function \( i^3 \)

Theorems

Sum of cubes formula

Suitable Grade Level

Grades 11-12