Answer:
B.
Step-by-step explanation:
took the unit test and got it right, EDGE2021
Summation formula is equivalent to the one below is -1 ∑ n=-4 (1/4) (-2)⁻ⁿ.
When there are series of data or digits to be added, a general formula is used to get the final sum value. The rule in terms of equation is called summation rule.
Given is the summation rule
3∑n=0 (-1/2)ⁿ (4)
This rule can be also written by interchanging the digits.
Remember 1ⁿ = 1 and (1/2)ⁿ = 2⁻ⁿ
Substituting it in the given equation, the new summation rule formed will be
-1 ∑ n=-4 (1/4) (-2)⁻ⁿ
Thus, the correct option is B.
Learn more about summation rule.
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