Question

which term of
an AP, 24, 21, 18, 15...
is
first
negative term​

Answer 1

Let nth term of the given AP be the first negative term.

AP = 24 , 21 , 18 , 15 .....

Here,

First term ( a ) = 24

Commmon difference ( d ) = 21-24 = -4.

Then , Tn <0

=> { a + ( n - 1 ) × d } <0

=> { 24 + ( n - 1 ) × -3 } <0

=> 27 - 3n <0

=> 27 < 3n

=> 3n > 27

=> n = 9.

n = 10

Hence,

The 10th term is the first negative term of the given AP.

can you please mark my answer as the BRAINLIEST , thank you

Answer 2

Answer:

0>24+(n–1)(-3)

0>24-3n+3

0>27-3n

n<9

so 10th term is first negative term