1.

The minimum value of `9^x+9^(1-x),x inR,` isA. 2B. 3C. 4D. none of these.

Answer» Correct Answer - D
Using `A.M.geG.M.,` we have
`(9x+9^(1-x))/(2)gesqrt(9^(x)xx9^(1-x))implies9^(x)+9^(1-x)ge6`
Hence, the least value of `9^(x)+9^(1-x)` is 6.


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