Question

-12,-9,-6...21find nterms

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Answer 1

Answer:

tn= -15+3n

Step-by-step explanation:

tn= a+(n-1)d

Answer 2

Answer:

a=-12, d=-12-(-9)=-12+9=-3

an=a+(n-1)d

an=-12+(n-1)-3

=12-3n+3

=15-3n

HOPE THIS IS CORRECT ANSWER