[" Show that "a_(1),a_(2),a_(3),......,a_(n),......." form an A.P."],[" Where "a_(n)=3+4n." Also find common difference."]

Show that a_(1),a_(2)"……"a_(n),"……." form an A.P. where a_(n) is defined as below : a_(n)=3+4n

Show that a_(1),a_(2)"……"a_(n),"……." form an A.P. where a_(n) is defined as below : a_(n)=9-5n

Show that a_(1),a_(2),......a_(n),.... from an AP where a_n is defined as below: (1)a_(n)=3+4n(2)a_(n)=9-5n Also find the sum of the first 15 terms in each case.

Show that a_(1), a_(2), …….., a_(n)….. form an AP where a_(n) is defined as below: (i) a_(n) = 3 + 4n . Also find the sum of the first 15 terms in each case.

Show that a_(1),a_(2),*a_(n),... form an AP where a_(n) is defined as below: (i) a_(n)=3+4n (ii) a_(n)=9-5n Also find the sum of the first 15 terms in each case.

If a_(n)=3-4n , then show that a_(1),a_(2),a_(3), … form an AP. Also, find S_(20) .

If a_(n)=3-4n , then show that a_(1),a_(2),a_(3), … form an AP. Also, find S_(20) .

The sixth term of an A.P.,a_(1),a_(2),a_(3),.........,a_(n) is 2. If the quantity a_(1)a_(4)a_(5), is minimum then then the common difference of the A.P.