Ответ:
d = 3
Объяснение:
37 - 16 = 21
21 : 7 = 3
Перевіримо
а2 = 19
а3 = 22
а4 = 25
а5 = 28
а6 = 31
а7 = 34
а8 = 37
[tex]\displaystyle\bf a_{n} = a_{1} + (n - 1)d \\ a_{8} = a_{1} + (8 - 1)d \\ a_{8} = a_{1} + 7d \\ 7d = a_{8} - a_{1} \\ d = \frac{a_{8} - a_{1}}{7} = \frac{37 - 16}{7} = \frac{21}{7} = 3[/tex]
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Verified answer
Ответ:
d = 3
Объяснение:
37 - 16 = 21
21 : 7 = 3
Перевіримо
а2 = 19
а3 = 22
а4 = 25
а5 = 28
а6 = 31
а7 = 34
а8 = 37
[tex]\displaystyle\bf a_{n} = a_{1} + (n - 1)d \\ a_{8} = a_{1} + (8 - 1)d \\ a_{8} = a_{1} + 7d \\ 7d = a_{8} - a_{1} \\ d = \frac{a_{8} - a_{1}}{7} = \frac{37 - 16}{7} = \frac{21}{7} = 3[/tex]