यदि x= sum(n=0)^(oo)a^(n), y= sum(n=0)^(...

यदि `x= sum_(n=0)^(oo)a^(n), y= sum_(n=0)^(oo)b^(n),z= sum_(n=0)^(oo)c^(n),` जबकि a, b, c समान्तर श्रेणी में हैं तथा `| a| lt 1,|b|lt 1` तथा `|c|lt 1`, तो x y तथा z

A

x,y,z तथा A.P में है

B

x,y,z एक A.P में है

C

`1/x,1/y,1/z` एक A.P में है

D

`1/x+1/y+1/z=1-(a+b+c)`

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