Find the sum of first 24 terms of the A.P. `a_1, a_2, a_3, ,` if it is know that `a_1+a_5+a_(10)+a_(15)+a_(20)+a_(24)=225.`

Find the sum of first 24 terms of the A.P. a_1,a_2, a_3 ......., if it is inown that a_1+a_5+a_(10)+a_(15)+a_(20)+a_(24)=225.

Find the sum of first 24 terms of the A.P. a_1,a_2, a_3 ......., if it is inown that a_1+a_5+a_(10)+a_(15)+a_(20)+a_(24)=225.

Find the sum of first 24 terms of the A.P.a-1,a_(2),a_(3),... if it is inown that a_(1)+a_(5)+a_(10)+a_(15)+a_(20)+a_(24)=225

Find the sum first 24 terms of A.P. a_1,a_2,a_3 ,..........., if it is know that a_1+a_5+a_10+a_15+a_20+a_24=225

The successive terms of an A.P. are a_(1), a_(2), a_(3) ,….. If a_(6)+a_(9)+a_(12)+a_(15)=20 then sum_(r=1)^(20)a_(r) =

"If "a_1,a_2,a_3,.....,a_n" are in AP, prove that "a_(1)+a_(n)=a_(r)+a_(n-r+1)""

a_1 , a_2 , ......a_(10) are in G.P a_7/a_5=25 Find a_(10)/a_8