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Unformatted text preview: with an explicit calculation or an argument. In each case < t < . (a) x ( t ) = e2  t  (b) x ( t ) = 1 t t 1 t < 1 (c) x ( t ) = ( t e t t < (d) x ( t ) = e t  6. Review of Complex Numbers (a) Simplify the following expression e j ( t + ) 1 + j (1j ) and leave the result in polar form. (b) Simplify (cos t + j sin t )(cos2 tj sin2 t ) and leave the result in polar form. 7. Write the following signals as a combination (sums or products) of scaled and shifted unit rectangles rect ( t ) and unit triangles ( t ) . 21 12 1 221 x(t) a) 21 12 1 221 t x(t) b)...
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 Fall '11
 lee

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