Sequence and series

Q. Let a1,a2,a3.......an be in arithmetic progression. Prove that:
1/a1an + 1/a2an1 +...........+ 1/ana1 = 2/a1+an( 1/a1 +1/a2+.........+ 1/an).

Please put brackets in proper places


@abhisheksingh thnx

@rushabhjain
Please give correct ans always