Question

Which term of the sequence, 5, 2, -1 ,……………….. is ( -55)?

Answer 1

Answer:

-4

Step-by-step explanation:

what do you mean by -55.

Answer 2

Step-by-step explanation:

first case :

the value of d is 2-5=-3

the formula is

tn=a+(n-1)d

Here tn=-55 ,a=5 ,d=-3

so therefore, substitute the value

-55=5+(n-1)-3

-55-5=-3n+3

-60=-3n+3

-60-3=-3n

-63=-3n

therefore n=21

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