The solution of the inequation ${4^{ - x + 0.5}} - {7.2^{ - x}} < 4,x \in R$ IS

$\left( {2,\frac{7}{2}} \right)$

JEE MATHEMATICS MCQ: QUADRATIC EQUATIONS

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Application +4 | -1

The solution of the inequation

{4^{ - x + 0.5}} - {7.2^{ - x}} < 4,x \in R

View answer and explanation

Correct option: A

\left( { - 2,\infty } \right)

The correct answer is A (

\left( { - 2,\infty } \right)

) because by substituting

2^{-x} = t

, the inequality can be solved for t, and then back-substituted to find the range of x.

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a

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