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If a,b,c are in A.P., then `10^(ax+10),10^(bx+10)`,10^(ex +10)` are in -A. A.PB. G.P only when `x gt0`C. G.P for all xD. G.P only when `x lt0` |
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Answer» Correct Answer - 3 We have : `2bx = ax + cx` `2(bx + 10) =(ax + 10) + (cx + 10)` `10^(2(bx + 10)) = 10 ^((ax + 10)+(cx+10))` `(10^(bx + 10))^(2) = (10^(ax+10)).(10^(cx +10))` i.e., Number are in G.P |
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