The type of formula that is represented by the given example =(D1+D17) in excel is known as; The SUM Formula function
What are functions in excel?
There are different types of formula functions in excel such as;
SUM
COUNT
COUNTA
IF
TRIM
MAX & MIN
Now, in this question, the formula we are given is =(D1+D17) and the example it represents is the SUM formula function.