Which term of the AP : 21 , 18 ,15, . . . . . is -81 ? Allso i, is any term 0 ? Give reason for your answer
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Answer:
n = 35 and 0 at n = 8
Step-by-step explanation:
In the following AP :-
a = 21
d = -3
an = -81
n = ?
Therefore ATQ,
an = a + (n-1)d
-81 = 21 + (n-1)-3
-81-21 = (n-1)-3
-102/-3 = (n-1)
34 = n-1
n = 35
Yes, 0 is also there
at n = 8
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