# Properties of DTFT to Infer the Inverse DTFT of Altered Data [closed]

Given a signal $x \left[ n \right]$ and its DTFT $X \left( {e}^{j \omega} \right)$.

Which property of the DTFT allows you to easily compute the inverse DTFT of $\frac{4 X \left( {e}^{j \omega} \right)}{\pi} - 2$?

• I'm voting to close this question as off-topic because no effort shown – Stanley Pawlukiewicz Jul 5 '18 at 17:27

$$\operatorname{DTFT} \left( \alpha x \left[ n \right] + \beta y \left[ n \right] \right) = \alpha \operatorname{DTFT} \left( x \left[ n \right] \right) + \beta \operatorname{DTFT} \left( y \left[ n \right] \right)$$