Evaluate the integral. sqrt(9+e^x)
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Evaluate the integral. sqrt(9+e^x)

[From: ] [author: ] [Date: 11-10-17] [Hit: ]
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∫√(9 + e^(x)) dx

u = √(9 + e^(x))

ln(u² - 9) = x

2u/(u² - 9) du = dx

∫2u²/(u² - 9) du

∫(2u² - 18 + 18)/(u² - 9) du

∫2 du + 3*∫(1/(u - 3) - 1/(u + 3)) du

2u + 3*ln|(u - 3)/(u + 3)| + C

2√(9 + e^(x)) + 3*ln|(√(9 + e^(x)) - 3)/(√(9 + e^(x)) + 3)| + C
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keywords: the,integral,sqrt,Evaluate,Evaluate the integral. sqrt(9+e^x)
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