Question

Which term of the AP 19, 91/5 , 87/5,------ is the first negative term? *​

Answer 1

Answer:

25th term is the first negative term.

Step-by-step explanation:

Here a = 19

common difference, d = 18.2 - 19 = - 0.8

$let \: nth \: term \: be \: < 0 \\ a + (n - 1)d < 0 \\ 19 + (n - 1)( - 0.8) < 0 \\ - 0.8n + 0.8 < - 19 \\ 0.8 + 19 < 0.8n \\ 19.8 < 0.8n \\ n > \frac{19.8}{0.8} \\ n > 24.75 \\ so \: first \: negative \: term \: is \: 25th \: term$

Answer 2

Answer:

this is correct...........................