Answer:
The first choice is the correct one
Step-by-step explanation:
That funny symbol is the Greek symbol for "the sum of". Sum means to add, so whatever numbers we have we are definitely adding them. The index goes from a starting point of 1 up to 4. That's those 2 numbers, one below and one above the sum symbol. The "n" in 7/n is what we are replacing with each number starting at 1 and ending at 4. 7/1, 7/2, 7/3, 7/4. Those are the numbers, now just put them together with plus signs between them and you're done.
