Find all sequences which are simultaneously A.P. and G.P.

If a,b,c are simultaneously in an A.P. and a G.P. , then : a^(b).b^(c).c^(a)=

Which of the following sequences are A.P. ? If it is an A.P. , find next two terms. 2,-2,-6,-10,……….

Which of the following sequences are A.P. ? If it is an A.P. , find next two terms. 5,12,19,26,…….

Which of the following sequences are A.P.? If they A.P. find the common difference. 2,4,6,8…..

Which of the following sequences are A.P.? If they A.P. find the common difference. 2,5/2,3,7/2….

Which of the following sequences are A.P.? If they A.P. find the common difference. -10,-6,-2,2….

Which of the following sequences are A.P.? If they A.P. find the common difference. 0,-4,-8,-12,…

Which of the following sequences are A.P.? If they A.P. find the common difference. -1/5,-1/5,-1/5,…

Which of the following sequences are A.P.? If they A.P. find the common difference. 127,132,137,…

Which of the following sequences are A.P. ? If it is an A.P. , find next two terms. (3)/(2),(1)/(2),-(1)/(2),………..