Question

which term of the AP 100,97.5,95,92.5............is the first negative term

Answer 1

hey mate
we have the AP as
100,97.5,95 ....
so common difference will be -2.5
and 1st term as 100
so use the formula to find nth term of an AP
tats, An=a +(n-1) d
so if u need ro give 1st negative no
assume it as -1
so when we use the equation u will get it as
-1=100+(n-1)-2.5
->n-1=-101/-2.5=40.14
so n=41.14
so 1st negative term will be 42 th term
i hope u understood!!