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The range of f(x)=6^(x)+3^(x)+6^(-x)+3^(...

The range of `f(x)=6^(x)+3^(x)+6^(-x)+3^(-x)+2` is :

A

`[-2,oo)`

B

`(-2,oo)`

C

`(6,oo)`

D

`[6,oo)`

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The correct Answer is:
D
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MODERN PUBLICATION-FUNCTIONS-MULTIPLE CHOICE QUESTIONS (LEVEL -II)
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