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3 years ago

find the common ratio r for the geometric sequence and use r to find the next three terms 5,15,45,135

Mathematics

1 answer:

Aleks04 [339]3 years ago

8 0

Answer: 405

Step-by-step explanation:

ratio r for the geometric sequence: 5, 15, 45, 135

r is a radios of a circle,

d is the Diameter

r1=5. r2=15, r3=45, r4=135, r5=?

2*r=d

so:

d1=10, d2=30, d3=90, d4= 270

now following the sequence:

r1+d1=r2 5+10=15

r2+d2=r3 15+30=45

r3+d3=r4 45+90=135

r4+d4=r5 therefore 135 + (135*2) = 135+270=405

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