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Diano4ka-milaya [45]
3 years ago
13

Find the nth term of this quadratic sequence 3 8 15 24

Mathematics
1 answer:
olga2289 [7]3 years ago
6 0

Answer:

35

Step-by-step explanation:

A quadratic sequence is a form. of mathematical progression of numbers in which the subsequent differences between each consecutive term differ by the exact amount. This is known as the common second difference.

Hence in this case,

we have

S= 3+8+15+24+…..+Tn - 1.

S=. 3+8+15+……………..Tn-1 + Tn

Deducting 2nd series from the first

We have 0=3+5+7+…….Tn

Hence, we have Tn= n (n+2)

= 24 (9+2)

= 24 + 11

= 35

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the sum of the first 6 terms of a geometric series is 15624 and the common ratio is 5. what is the first term of the series?
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Answer:

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Step-by-step explanation:

Sum of the first 6 terms S6 = 15624

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divide both sides by 15624

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a= 4

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