Step 1:

e)The series is $\"\"$ .

Formula for summation notation of a sequence: $\"\"$ .

The series $\"\"$ has 10 terms and each of the form $\"\"$ .

$\"\"$ starts with 0 and ends with 9.

Summation notation for the series is,

$\"\"$

Step 2:

f)The series is $\"\"$

Formula for summation notation of a sequence: $\"\"$ .

$\"\"$

The series $\"\"$ has 5 terms and each of the $\"\"$ , $\"\"$ starts with 1 and ends with 5.

Summation notation for the series is,

$\"\"$