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| 1. |
If `x in R ,`the numbers `2^(1+x)+2^(1-x), b//2,36^x+36^(-x)`form an A.P., then `b`may lie in theinterval`[12 ,oo)`b. `[6,oo)`c. `(-oo,6]`d. `[6, 12]`A. `[12,oo)`B. `[6,oo)`C. `(-oo,6)`D. `[6,12]` |
| Answer» Correct Answer - A | |