Find the 15th term in the following
arithmetic sequence :
1, 6, 11, 16,
2 answers:
Answer:
71
Step-by-step explanation:
This arithmetic sequence starts at 1 and increases by 5 every time. The formula for this sequence could be expressed as A(n) = 1 + 5(n-1).
Since you're finding the 15th term, substitute n = 15 into the formula.
A(15) = 1 + 5((15)-1) = 1 + 5(14) = 1 + 70 = 71
Answer: 71
Step-by-step explanation:
Every time the number in the sequence increases, it adds 5.
1. 1
2. 1+5=6
3. 6+5=11
4. 11+5=16
5. 16+5=21
6. 21+5=26
7. 26+5=31
8. 31+5=36
9. 36+5=41
10. 41+5=46
11. 46+5=51
12. 51+5=56
13. 56+5=61
14. 61+5=66
15. 66+5=<em><u>71</u></em>
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