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find the sum of the first 19 terms of the arithmetic squence: 9,14,19,34...?​

Sagot :

KURTGABRIELCRUZ28IN

Answer:

14

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RUTHDORADOIN

Answer:

[tex]|a(n)= a+ (n- 1)d[/tex]

A=19

n=9

d=5

[tex]a19 = 9(19 - 1)5 \\ a19 = 9(18)5 \\ a19 = 99 \\ [/tex]

Answer:

the sum of the first 19 terms=99nth

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