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Evaluate The Integral.(Sec2(T) I + T(T2 +1)4 J + T6 Ln(T) K) Dt

Sagot :

The Integral [tex]\int \sec ^2\left(t\right)i+t\left(t^2+1\right)^4j+t^6\ln \left(t\right)kdt = i\tan \left(t\right)+\frac{j\left(t^2+1\right)^5}{10}+k\left(\frac{1}{7}t^7\ln \left(t\right)-\frac{t^7}{49}\right)[/tex]

Given integral;

[tex]\int \sec ^2\left(t\right)i+t\left(t^2+1\right)^4j+t^6\ln \left(t\right)kdt[/tex]

By solving the above integral, we have;

⇒ [tex]\int \sec ^2\left(t\right)i+t\left(t^2+1\right)^4j+t^6\ln \left(t\right)kdt[/tex]

By applying the sum rule,

⇒ [tex]\int f\left(x\right)\pm g\left(x\right)dx=\int f\left(x\right)dx\pm \int g\left(x\right)dx[/tex]

[tex]=\int \sec ^2\left(t\right)idt+\int \:t\left(t^2+1\right)^4jdt+\int \:t^6\ln \left(t\right)kdt[/tex]

[tex]\int \sec ^2\left(t\right)idt=i\tan \left(t\right)[/tex]

[tex]\int \:t\left(t^2+1\right)^4jdt = \frac{j\left(t^2+1\right)^5}{10}[/tex]

[tex]\int \:t^6\ln \left(t\right)kdt = k\left(\frac{1}{7}t^7\ln \left(t\right)-\frac{t^7}{49}\right)[/tex]

⇒ [tex]i\tan \left(t\right)+\frac{j\left(t^2+1\right)^5}{10}+k\left(\frac{1}{7}t^7\ln \left(t\right)-\frac{t^7}{49}\right)[/tex]

Therefore, the integral [tex]\int \sec ^2\left(t\right)i+t\left(t^2+1\right)^4j+t^6\ln \left(t\right)kdt = i\tan \left(t\right)+\frac{j\left(t^2+1\right)^5}{10}+k\left(\frac{1}{7}t^7\ln \left(t\right)-\frac{t^7}{49}\right)[/tex]

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