{{I_1}}&{I_1^2}&{{I_2}} \\
{{e^{{I_1} + {I_2}}}}&{I_2^2}&{ - 1} \\
1&{I_1^2 + I_2^2}&{ - 1}
\end{array}} \right|$ ની કિમંત મેળવો.
- A$1$
- B$ - \frac{{11}}{2}$
- C$9$
- ✓$0$
Put $\mathrm{x}=\frac{1}{\mathrm{t}} ; \mathrm{dx}=-\frac{1}{\mathrm{t}^{2}} \mathrm{dt}$
$\mathrm{I}_{2}=\int_{1}^{t=\sin \theta} \frac{\frac{-1}{t^{2}} d t}{\frac{1}{t}\left(\frac{1}{t^{2}}+1\right)}$
$=\int_{1}^{\sin \theta} \frac{-t}{t\left(1+t^{2}\right)} d t=-\int_{1}^{\sin \theta} \frac{t}{\left(1+t^{2}\right)} d t$
$I_{2}=-I_{1}$
$\therefore I_{1}+I_{2}=0$
$\Delta=\left|\begin{array}{ccc}{\mathrm{I}_{1}} & {\mathrm{I}_{1}^{2}} & {\mathrm{I}_{2}} \\ {\mathrm{e}^{0}} & {\mathrm{I}_{2}^{2}} & {-1} \\ {1} & {\mathrm{I}_{1}^{2}+\mathrm{I}_{2}^{2}} & {-1}\end{array}\right|$
Apply $\mathrm{C}_{1} \rightarrow \mathrm{C}_{1}+\mathrm{C}_{3} ;$ we get
$\Delta=\left|\begin{array}{ccc}{0} & {\mathrm{I}_{1}^{2}} & {\mathrm{I}_{2}} \\ {0} & {\mathrm{I}_{2}^{2}} & {-1} \\ {0} & {\mathrm{I}_{1}^{2}+\mathrm{I}_{2}^{2}} & {-1}\end{array}\right|=0$
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