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bearhunter [10]
3 years ago
6

Consider a sequence that follows a minus 5 pattern: 30, 25, 20, 15, ….

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
3 0

Answer:

a_2_0=-65

Step-by-step explanation:

As we can see, the sequence starts from 30 and decreases by 5 each time. So, one possible formula for that sequence could be:

a_n=35-5n\hspace{10}n\in N

Let's confirm the formula by evaluating the first 4 terms:

a_1=35-5(1)=35-5=35\\a_2=35-5(2)=35-10=25\\a_3=35-5(3)=35-15=20\\a_4=35-5(4)=35-20=15

Finally evaluating n=20:

a_2_0=35-5(20)=35-100=-65

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