find the first negative term of the AP 18,17*1/5,16*2/5
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Answer:
n = 24
Step-by-step explanation:
If the term is negative then it shall be
0 > an
in the form.
a = 19
d = - 4/5
an < 0
a + ( n - 1 )d < 0
19 + ( n - 1 ) - 4/5 < 0
19 - 4n/5 + 4/5 < 0
( 95 - 4n + 4 )/5 < 0
99 - 4n < 0
99 < 4n
24 = n
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