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3 years ago

Given {27,15,3,-9,...} find a11

Mathematics

2 answers:

coldgirl [10]3 years ago

4 0

Answer: -21, -33, -45

Step-by-step explanation:

each next number is being subtracted by 12 so

vova2212 [387]3 years ago

3 0

Answer:

-91

Step-by-step explanation:

a1=27

d=15-27=-12

an=27+(n-1)(-12)=27-12n+12=39-12 n

a11=39-12(11)=39-132=-91

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Scrat [10]

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