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algol13
3 years ago
9

In an arithmetic​ sequence, the nth term an is given by the formula An=a1+(n−1)d​, where a1is the first term and d is the common

difference.​ Similarly, in a geometric​ sequence, the nth term is given by an=a1•rn−1.
Use these formulas to determine the indicated term in the given sequence.

The 19th term of 19​,42​,65​,88​,...
Mathematics
1 answer:
Olin [163]3 years ago
8 0

Answer: 433

Step-by-step explanation:

The given sequence : 19​,42​,65​,88​,...

We can see that the terms ha common difference as :-

42-19=23\\65-42=23\\88-65=23

Thus, its an Arithmetic progression with common difference (d)=23

The formula to find the nth term is :-

a_n=a_1+(n-1)d

Now, the 19th term of the given sequence :-

a_{19}=19+(19-1)(23)\\\\=19+(18)(23)\\\\=19+414=433

Hence, the 19th term of 19​,42​,65​,88​,... is 433.

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