Calculus Examples

Evaluate the Summation sum from i=1 to 20 of (i-1)^2
Step 1
Simplify the summation.
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Step 1.1
Rewrite as .
Step 1.2
Expand using the FOIL Method.
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Step 1.2.1
Apply the distributive property.
Step 1.2.2
Apply the distributive property.
Step 1.2.3
Apply the distributive property.
Step 1.3
Simplify and combine like terms.
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Step 1.3.1
Simplify each term.
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Step 1.3.1.1
Multiply by .
Step 1.3.1.2
Move to the left of .
Step 1.3.1.3
Rewrite as .
Step 1.3.1.4
Rewrite as .
Step 1.3.1.5
Multiply by .
Step 1.3.2
Subtract from .
Step 1.4
Rewrite the summation.
Step 2
Split the summation into smaller summations that fit the summation rules.
Step 3
Evaluate .
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Step 3.1
The formula for the summation of a polynomial with degree is:
Step 3.2
Substitute the values into the formula.
Step 3.3
Simplify.
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Step 3.3.1
Cancel the common factor of and .
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Step 3.3.1.1
Factor out of .
Step 3.3.1.2
Cancel the common factors.
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Step 3.3.1.2.1
Factor out of .
Step 3.3.1.2.2
Cancel the common factor.
Step 3.3.1.2.3
Rewrite the expression.
Step 3.3.2
Simplify the numerator.
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Step 3.3.2.1
Multiply by .
Step 3.3.2.2
Add and .
Step 3.3.2.3
Multiply by .
Step 3.3.2.4
Add and .
Step 3.3.3
Simplify the expression.
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Step 3.3.3.1
Multiply by .
Step 3.3.3.2
Divide by .
Step 4
Evaluate .
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Step 4.1
The formula for the summation of a polynomial with degree is:
Step 4.2
Substitute the values into the formula and make sure to multiply by the front term.
Step 4.3
Simplify.
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Step 4.3.1
Simplify the expression.
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Step 4.3.1.1
Add and .
Step 4.3.1.2
Multiply by .
Step 4.3.2
Cancel the common factor of .
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Step 4.3.2.1
Factor out of .
Step 4.3.2.2
Cancel the common factor.
Step 4.3.2.3
Rewrite the expression.
Step 4.3.3
Multiply by .
Step 5
Evaluate .
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Step 5.1
The formula for the summation of a constant is:
Step 5.2
Substitute the values into the formula.
Step 5.3
Multiply by .
Step 6
Add the results of the summations.
Step 7
Simplify.
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Step 7.1
Subtract from .
Step 7.2
Add and .