Respuesta :

maniknandini

Answer:

-679

Step-by-step explanation:

14, 5, -4, ...

a = 14

d = 5 - 14 = -9

nth term = a + (n - 1) d

n(78) = 14 + (78 - 1) * -9

= 14 + 77(-9)

= 14 -693

= -679

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answer

the formula is a+(n-1)d

a: the first term

d:the 2nd term -the first term

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