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Question
Math
Posted 10 months ago
What is the definite integral of y=x3y = x^3 from x=1x = 1 to x=4x = 4?
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Answer from Sia
Posted 10 months ago
Solution by Steps
step 1
Calculate the antiderivative of x3 x^3
step 2
The antiderivative of x3 x^3 is x44+C \frac{x^4}{4} + C , where C C is the constant of integration
step 3
Evaluate the antiderivative from x=1 x = 1 to x=4 x = 4
step 4
Substitute x=4 x = 4 into the antiderivative to get 444=64 \frac{4^4}{4} = 64
step 5
Substitute x=1 x = 1 into the antiderivative to get 144=14 \frac{1^4}{4} = \frac{1}{4}
step 6
Subtract the value at x=1 x = 1 from the value at x=4 x = 4 to find the definite integral: 6414=2554 64 - \frac{1}{4} = \frac{255}{4}
Answer
2554 \frac{255}{4} or 63.75 63.75
Key Concept
Definite Integral of a Polynomial Function
Explanation
The definite integral of a polynomial function from a a to b b is found by evaluating the antiderivative at b b and subtracting the antiderivative evaluated at a a .

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