A) \[\pi {{r}^{2}}=f\]
B) \[\pi {{r}^{2}}-f\]
C) if bower hall part is covered by black sheet, then area of the image is equal to \[f(x)=\left\{ \begin{align} & |{{x}^{3}}+{{x}^{2}}+3x+\sin x|.\left( 3+\sin \frac{1}{x} \right),\,x\ne 0 \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,0,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x=3 \\ \end{align} \right.\]
D) if f is doubled, intensity will increase
Correct Answer: B
Solution :
\[C{{H}_{3}}CHO+{{H}_{2}}NOH\xrightarrow[{}]{Na,{{C}_{2}}{{H}_{5}}OH}\] Hence,\[C{{H}_{3}}CHO+{{N}_{2}}C{{H}_{2}}\xrightarrow[{}]{NaB{{H}_{4}}}\]You need to login to perform this action.
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