Math, asked by kamal521386, 1 year ago

if 5 times the 5th term of an A. P is equal to 8 times the 8th term show that it 13th term is zero

Answers

Answered by piyushraj2702

Let a and d be the first term and common difference of A.P.
Given, 5a 5 = 8 a 8
5 (a + 4d) = 8(a + 7d) (an = a + (n – 1) d)
5a + 20d = 8a + 56d
5a – 8a = 56d – 20d
–3a = 36d
a = –12d … (1)
a 13 = a + 12d = –12d + 12d = 0 (Using (1)) therefore a 13=0

kamal521386: mtlb

piyushraj2702: what OK you are not marking and saying ok

piyushraj2702: there is a option on top of my answer click on it

piyushraj2702: have you got it

kamal521386: I am done

kamal521386: yes

piyushraj2702: thanks

kamal521386: sir I am ask an another question to h

kamal521386: to u plz give the solution

piyushraj2702: OK ask

Answered by tmullagurip29jxy

hope this helps you .........

Attachments:

kamal521386: that

kamal521386: thq

piyushraj2702: Jack... I'm not sure if you want to take care if you want to take my car and I don't know that how will you show that for a substance to burn it is essential to reach its ignition temperature of a good fuel should n mine hi class and I don't know that how will you show that for a substance to burn it is essential to reach its ignition temperature of a good fuel should n mine hi class and I don't know that how will we do have a good day at work now so I can see the video and I

kamal521386: sirr

kamal521386: I need your help

Previous Question

Next Question