Math, asked by sureshkumarvedha01, 5 months ago

Which term of an A.P. 16,11,6,1, ……… is -54?

Answers

Answered by ajay8949
10

16,11,6,1..........

 \binom{a}{ \:  \:  \: n}  =  - 54

a = 16

d = 11 - 16 \\  =  >  - 5

 \binom{a}{ \:  \:  \: n}  = a + (n - 1)d

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

 - 54 = 16 - 5n + 5

5n = 21 + 54

5n = 75

n = 15

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