which term of the AP : 125, 121, 117,...is 1st negetive term?
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Answered by
2
33rd term is the first negative that is -2.
RabaabZahidah:
How -2??
Please explain in detail naa...
given that a=125,d=-4,
aiyo gawd.
let us take a+(n-1)d=0 then we will get n as 32.5 but n cant be decimal therefore the next natural number will be n.so n=33.by substituting n=33 in a+(n-1)d we will get-2
are u satisfied?
D: nyaah
not so much, a little confusing in the second part of getting -2.Can you explain it again?Pleaseee :P
Answered by
5
Let first negative term be An
a=125,d=-4
An<0
,
a+(n-1)d<0,
125+(n-1)(-4)<0,
(n-1)(-4)<-125,
(n-1)4>125,
n-1>31.25,
n>32.25,
n=33,
33th term is first negative term
33th term is first negative term
a+(33-1)d=125+32×-4=125-128=-3
hope it helps
-3???
Ok thanks a bunch angel :)
welcome felt good helping u
:)
:D
Felt good being helped :P
:)
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