Question

Find the first negative term of the sequence 999,995,991,987,........​

Answer 1

Answer:

Thus , the first negative term of sequence is (-1)(251th term)

Step-by-step explanation:

Here, a=999 ,d= -4

so, let us find the an(last numbers)

an= a+(n-1)d

= 999+(n-1)(-4)

= 999-4n+4

=1003-4n---(1)

now,

= an<0

=1003-4n <0

=1003<4n

n>1003/4

n>250.75

or , n=251

we put , n=251 in equation(1)

=1003-4(251)

=1003-1004

=-1

Hope you understood...(^-^)