(v) f(−3)=2(−3)+3=−6+3=−3 f(-3)=\sqrt{2(-3)+3}=\sqrt{-6+3}=\sqrt{-3}f(−3)=2(−3)+3=−6+3=−3 So it is not defined in real numbers. Not defined (in real numbers)\boxed{\text{Not defined (in real numbers)}}Not defined (in real numbers)