3 years ago

Which one is the nth term if a1=15 and d= -3

Mathematics

1 answer:

levacccp [35]3 years ago

8 0

Answer:

nth term = 18 - 3n

Step-by-step explanation:

nth term = a + (n - 1)d

a1 = 15

d = -3

nth term = a + (n - 1)d

= 15 + (n - 1)-3

= 15 + (-3n + 3)

= 15 - 3n + 3

= 18 - 3n

nth term = 18 - 3n

For instance, if you want to find the 10th term

nth term = 18 - 3n

10th term = 18 - 3(10)

= 18 - 30

= -12

10th term = -12

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Which one is the nth term if a1=15 and d= -3​

Which one is the nth term if a1=15 and d= -3