Question

5. Which term of an A.P. 16, 11, 6, 1,... is – 54 ?​

Answer 1

Here is your answer ✌️✌️

a=16

d=-5

-54=a+(n-1)d

-54=11+(n-1)×-5

-54÷-5=(n-1)

14=(n-1)

n=15

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Answer 2

an=-54

a=16

d= -5

Step-by-step explanation:

an=a+(n-1)d

-54=16+(n-1)(-5)

-54-16=(n-1)(-5)

-70=(n-1)(-5)

-70÷(-5)=n-1

14=n-1

n=15

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