Tammy2764 Tammy2764

06-11-2021
Mathematics

contestada

The first term of an Arithmetic progression is 3and the last term is 9, find the number of terms in the progression if the common difference is 3/2

Respuesta :

anasweeney43 anasweeney43

06-11-2021

Answer:

n = 5 terms

Step-by-step explanation:

An = a1 + (n-1)d

9 = 3 + (n-1) 3/2

9 = 3 + 3/2n - 3/2

9 = 3/2 + 3/2n

9 - 3/2 = 3/2n

(15/2) / (3/2) = n

30/6 = n

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