which term of the AP 21,18,15....,is zero?
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Given
AP=21,18,15,...
Here.
a=21
d=18-21=-3
Now to find the term which is zero.
using An=a+(n-1)d
→0=21+(n-1)(-3)
→-21=(-3n)+3
→-21-3=(-3n)
→(-24)=(-3n)
→24=3n
→24/3=n
→n=8
So Zero is the 8-TH term of the AP.
Hope it Helps...
Regards,
Leukonov.
AP=21,18,15,...
Here.
a=21
d=18-21=-3
Now to find the term which is zero.
using An=a+(n-1)d
→0=21+(n-1)(-3)
→-21=(-3n)+3
→-21-3=(-3n)
→(-24)=(-3n)
→24=3n
→24/3=n
→n=8
So Zero is the 8-TH term of the AP.
Hope it Helps...
Regards,
Leukonov.
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