Question

if the 9th term of an AP is 0 then prove 29th term is double of 19th term

Answer 1

HELLO DEAR

LET THE FIRST TERM IS a
and COMMON DIFFERENCE is d

a+(9-1)d =0

a=-8d -----------------(1)


a29=a+28d--------(2)


a19=a+18d---------(3)

from(1)&(3) and using(1)

(a+28d)=2(a+18d)

-8d+28d=2(-8d+18d)

20d=2*10d

20d=20d


I HOPE ITS HELP YOU DEAR,
THANKS

Answer 2

Answer:

Step-by-step explanation:

LET THE FIRST TERM IS a

and COMMON DIFFERENCE is d

a+(9-1)d =0

a=-8d -----------------(1)

a29=a+28d--------(2)

a19=a+18d---------(3)

from(1)&(3) and using(1)

(a+28d)=2(a+18d)

-8d+28d=2(-8d+18d)

20d=2*10d

20d=20d