Which term of the progression is 19, 18 1 by 5,17 2 by 5, so on is the first negative term
Answers
Answered by
1
Answer:
Step-by-step explanation:
rithmetic series with
a = 19
d = -4/5
a + (n-1)d < 0
19 + (n-1)(-4/5) < 0
19 - (4/5)n + 4/5 < 0
times 5
95 - 4n + 4 < 0
-4n < -99
n > 99/4
n > 24.75
so it must be term(25) which is the first one negative.
check:
term(25) = 19 + 24(-4/5) = -1/5
term(24) = 19 + 23(-4/5) = 3/5
OK
Answered by
0
Answer:
Step-by-step explanation:
if 9th term
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