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sahilrathod202p63up3:
But u have state that n>9
n=10 is the correct answer
n = 10 is the right ans.
????
Guys don't report pls
is it right
yes
the first negative term is -3
yes a10 = -3
a9 = 0
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Given AP is 24.21,18.
Let a be the first term and d be the common difference.
Given a = 24.
d = 21 - 24
= -3.
Now,
an < 0
(a + (n - 1) * d) < 0
(24 + (n - 1) * (-3)) < 0
(24 - 3n + 3) < 0
27 - 3n < 0
27 < 3n
3n > 27
n > 9.
Therefore the 10th term is the first negative term in the AP.
Hope this helps!
Let a be the first term and d be the common difference.
Given a = 24.
d = 21 - 24
= -3.
Now,
an < 0
(a + (n - 1) * d) < 0
(24 + (n - 1) * (-3)) < 0
(24 - 3n + 3) < 0
27 - 3n < 0
27 < 3n
3n > 27
n > 9.
Therefore the 10th term is the first negative term in the AP.
Hope this helps!
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