Sagot :
Answer:
Problem:
Find the formula for nth term of each arithmetic sequence 20,17,14,11
Answer:
An = 23 - 3n
Step-by-step explanation:
Formula:
An = A1 + (n - 1)d
Find the formula:
Given:
A1 = 20
d = -3
An = ?
Solve for nth formula:
An = A1 + (n - 1)d
An = 20 + (n - 1)-3
An = 20 - 3n + 3
An = 23 - 3n
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