which term of the AP 21, 18, 15 ..., is zero____________
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Answered by
2
Answer:
The given is in A.P.
⇔ Arithmetic Progression.
a=21
a+d=18
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d = -3
⇒a(nth term)= a+(n-1)d
⇒0=a+(n-1)d
⇒0=21+[n-1](-3)
⇒n-1 = -21/-3
⇒n-1 = 7
⇒n =8
Step-by-step explanation:
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Answered by
0
Step-by-step explanation:
the given isin AP
A=21
D=second term -first term
18-21
-3
An=a+(n-1)-3
0=21+(n-1)-3
0-21=-3n-3
0=6n
n=6
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