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The integral I = ∫e5log⁡ex−e4log⁡exe3log⁡ex−e2log⁡exdx\int \frac{e^{5\log_e x} - e^{4\log_e x}}{e^{3\log_e x} - e^{2\log_e x}} dx is equal to

Solution

✅ Correct Option: 3

The integral I=∫e5log⁡ex−e4log⁡exe3log⁡ex−e2log⁡exdxI = \int \frac{e^{5\log_e x} - e^{4\log_e x}}{e^{3\log_e x} - e^{2\log_e x}} dx can be simplified using the property ealog⁡ex=xae^{a\log_e x} = x^a.

Applying this property to each term:

e5log⁡ex=x5e^{5\log_e x} = x^5

e4log⁡ex=x4e^{4\log_e x} = x^4

e3log⁡ex=x3e^{3\log_e x} = x^3

e2log⁡ex=x2e^{2\log_e x} = x^2

The integral becomes:

I=∫x5−x4x3−x2dxI = \int \frac{x^5 - x^4}{x^3 - x^2} dx


Factoring the numerator and denominator:

Numerator: x5−x4=x4(x−1)x^5 - x^4 = x^4(x - 1)

Denominator: x3−x2=x2(x−1)x^3 - x^2 = x^2(x - 1)

I=∫x4(x−1)x2(x−1)dxI = \int \frac{x^4(x - 1)}{x^2(x - 1)} dx


Canceling (x−1)(x-1) from numerator and denominator, and simplifying:

I=∫x4x2dxI = \int \frac{x^4}{x^2} dx

I=∫x2dxI = \int x^2 dx


Using the power rule for integration:

I=x33+CI = \frac{x^{3}}{3} + C

Therefore, the integral equals x33+C\frac{x^3}{3} + C.

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