Shimmerie Shimmerie

16-02-2021
Mathematics

contestada

Find the sum of the Arithmetic Series on the picture.

Find the sum of the Arithmetic Series on the picture class=

Respuesta :

16-02-2021

Answer:

Step-by-step explanation:

The sum of the sequence is the average of first and last terms times the number of terms.

(3n+4) for 3rd and 7th terms and the number of terms is 7-3+1=5 so

(13+25)5/2

38(5/2)

19(5)

95

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