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If x1, x2, . . . . x20 are in H.P and x1, 2, x20 are in G.P., then19∑r=1x1xr+1= |
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Answer» If x1, x2, . . . . x20 are in H.P and x1, 2, x20 are in G.P., then19∑r=1x1xr+1= |
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