Q. Evaluate the integral ∫5x+5x+4dx.Choose 1 answer:(A) 51x+51ln∣x+1∣+C(B) 51x+52ln∣x+1∣+C(C) 51x+53ln∣x+1∣+C(D) 51x+54ln∣x+1∣+C
Simplify the integrand: Simplify the integrand by factoring out the common factor in the denominator. \int\frac{x+\(4\)}{\(5\)x+\(5\)}\,dx = \int\frac{x+\(4\)}{\(5\)(x+\(1\))}\,dx
Divide numerator by denominator: Divide each term in the numerator by the denominator.\(\newline∫5(x+1)x+4dx=51∫(x+1x+x+14)dx
Split into two integrals: Split the integral into two separate integrals.(\frac{\(1\)}{\(5\)})\int(\frac{x}{x+\(1\)} + \frac{\(4\)}{x+\(1\)})dx = (\frac{\(1\)}{\(5\)})\int(\frac{x}{x+\(1\)})dx + (\frac{\(1\)}{\(5\)})\int(\frac{\(4\)}{x+\(1\)})dx
Recognize derivative of natural log: The first integral is the integral of \(\frac{x}{x+1}. We can simplify this by recognizing it as a derivative of a natural log.\int\left(\frac{x}{x+\(1\)}\right)dx = \ln|x+\(1| + C
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