Question

if 5timesof 5 th term of an ap is equal to 8 times of 8th term then show that 13th term is 0​

Answer 1

Answer:

Step-by-step explanation:

5(a+4d)=8(a+7d)

so

5a+20d=8a+56d

now

0=3a+12d

0=3(a+12d)

0=3(13th term)

so 13th term is zero