 My Math Forum Is $\int\frac{14x^6+2x}{2x^7+x^2}\,\mathrm dx=\ln\left(2x^7+x^2\right) + C$ false?
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 October 3rd, 2018, 06:31 PM #1 Newbie   Joined: Oct 2018 From: Australia Posts: 4 Thanks: 0 Is $\int\frac{14x^6+2x}{2x^7+x^2}\,\mathrm dx=\ln\left(2x^7+x^2\right) + C$ false? Is $\displaystyle \int\frac{14x^6+2x}{2x^7+x^2}\,\mathrm dx=\ln\left(2x^7+x^2\right) + C$ false? Last edited by skipjack; October 3rd, 2018 at 07:27 PM. October 3rd, 2018, 07:37 PM #2 Global Moderator   Joined: Dec 2006 Posts: 20,965 Thanks: 2214 If $x$ is real, I would usually give $\displaystyle \int\!\frac{14x^6+2x}{2x^7+x^2}\,\mathrm dx=\ln\left|2x^7+x^2\right| + C$. Why did you ask? October 4th, 2018, 12:04 PM   #3
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 Originally Posted by maths noob Is $\displaystyle \int\frac{14x^6+2x}{2x^7+x^2}\,\mathrm dx=\ln\left(2x^7+x^2\right) + C$ false?
Why ask us? Just take the derivative of the proposed solution and check. Tags \$intfrac14x6, 2x2x7, dxlnleft2x7, false, mathrm, x2right Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post ghostwin Complex Analysis 2 November 16th, 2017 04:42 AM Chikis Algebra 6 July 15th, 2014 06:16 PM cait Calculus 4 July 12th, 2014 03:10 PM stainburg Calculus 17 November 24th, 2013 12:14 AM Yegreg Number Theory 1 December 3rd, 2007 07:33 PM

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