which term of ap 21 18 15.... is -3
Answers
Answered by
1
Answer:
12
Step-by-step explanation:
9 is the answer
you can find it by using
an=(n-1) d
where
a=21
d=a2-a1
d=18-21
= -3
an=(-3-1)-3
an=12
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Answered by
1
Answer:
-3 is the 9th term of the given A.P.
Step-by-step explanation:
Given:
a = 21
d = a₂ - a = 18 - 21 = -3
To find : Which term of the given A.P is -3.
Solution : Let aₓ = -3.
We know
aₓ = a + (x-1)d
-3 = 21 + (x-1) -3
-3 = 21 - 3x +3
-3 = 24 - 3x
3x = 27
x = 9
Hope this helps you!
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