Which term of an A.p.16,11,6,....Is -54 ?

1.	Which term of an A.p.16,11,6,....Is -54 ?
Answer» Answer:15th TERM Step-by-step explanation: d = term 2 - term 1 = 11 - 16 = -5. a (first term) = 16 The formula for A.P. is ; SN = a + ( n - 1 ) d where, Sn is the value of nth term ,i.e., -54. Now , put the values of a , n and Sn in the formula. -54 = 16 + ( n - 1 ) (-5) - 70 = -5n + 5 -75 = -5n n = 15

Answer»

Answer:15th TERM

Step-by-step explanation:

d = term 2 - term 1 = 11 - 16 = -5.

a (first term) = 16

The formula for A.P. is ;

SN = a + ( n - 1 ) d

where, Sn is the value of nth term ,i.e., -54.

Now , put the values of a , n and Sn in the formula.

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

- 70 = -5n + 5

-75 = -5n

n = 15

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Which term of an A.p.16,11,6,....Is -54 ?

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