Question

If the4th term of an AP is twice the 8th term then prove that the 10th term is twice its 11th term

Answer 1

a+3 d=2 (a+ 7 d)
a= -11 d
LHS::
10 th term
a+ 9 d
-11 d+ 9 d
-2 d

RHS::
11 term
a+ 10d
-11 d +10 d
- d
=> 2( LHS) = RHS.

HOPE IT HELP YOU.

Answer 2

Hope it helped..
Plz mark as the brainliest answer off u feel so...