Unlike functional magnetic resonance imaging ( fMRI ), near-infrared spectroscopy (NIRS a. records the frequency and amplitude of brain waves in response to particular stimuli b. is appropriate for infants and young children, who can move within a limited range during testing c. enables identification of general regions of stimulus-induced activity d. detects changes in electrical brain-wave activity in the cerebral cortex

3) \( \lim _{x \rightarrow-2} \frac{x^{2}-4}{x+2}= \)

3) \( 3\left(\frac{2}{3} x-\frac{1}{2}\right)^{2}= \)

S4. Un rettangolo ha l'area di \( 11,07 \mathrm{dm}^{2} \mathrm{e} \mathrm{la} \) base di 41 cm . Quanto misura l'altezza? Qual è il suo perimetro? [ \( 27 \mathrm{~cm} ; 136 \mathrm{~cm} \) ]

Exercises 1.3.1 For every one-dimensional set \( C \), define the function \( Q(C)=\sum c f(x) \) where \( f(x)=\left(\frac{2}{3}\right)\left(\frac{1}{3}\right)^{x}, x=0,1,2, \ldots \), zero elsewhere. If \( C_{1}=\{x: x= \) \( 0,1,2,3\} \) and \( C_{2}=0,1,2, \ldots \), find \( Q\left(C_{1}\right) \) and \( Q\left(C_{2}\right) \). Hint: Recall that \( S_{n}=a+a r+ \) \( \cdots+a r^{n-1}=\frac{a\left(1-r^{n}\right)}{1-r} \quad \) and, hence, it follows that \( \lim _{n \rightarrow \infty} S_{n}=\frac{a}{1-r} \) provided that \( |r|<1 \).

The length, \( l \mathrm{~cm} \), of a line is 18.3 cm , correct to the nearest millimetre. Complete this statement about the value of \( l \).