Answer
$1$
Work Step by Step
The lower limit of $j$ is $0$ and the upper limit is also $0$.
Thus, evaluate the given summation for $j=0$ to obtain:
$=(0+1) \cdot 2^0
\\=1 \cdot 1
\\=1$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.