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The true set values of 'a' for which th...

The true set values of 'a' for which the inequality `int _(a)^(0)(3^(-2x)-2.3^(-x)) dx ge 0` is true, is

A

`[0,1]`

B

`[-infty, -1]`

C

`[0, infty]`

D

`[-infty,-1] uu[1,infty]`

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The correct Answer is:
D
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