gonzalez113bi gonzalez113bi

04-06-2020
Mathematics

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The second term of a geometric sequence is 17.5 and the third term is 122.5. What is the common ratio? What is the first term?

Respuesta :

Stephen46 Stephen46

09-06-2020

Step-by-step explanation:

U2=ar

U2=17.5

U3=ar^2

U3=122.5

U3/U2=122.5/17.5

ar^2/ar=7

r=7

17.5=ar

17.5=7a

a=2.5

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