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 know that a_(1)+a_(5)+a_(10)+a_(15)+a_(20)+a_(24)=225

(i) 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 know that a_(1) + a_(5) + a_(10) + a_(15) + a_(20) + a_(24) = 225

Find the sum of first 16 terms of an A.P.a_(1),a_(2),a_(3)......... If it is known that a_(1)+a_(4)+a_(7),+a_(10)+a_(16)=147

If the sum of first 11 terms of an A.P., a_(1),a_(2),a_(3),.... is 0(a_(1)!=0) then the sum of the A.P., a_(1), a_(3),a_(5), ......,a_(23) is k a_(1) , where k is equal to :

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) =

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)