3 years ago

Solve for x: 2eˣ - 7 = 21

Mathematics

1 answer:

zepelin [54]3 years ago

3 0

2eˣ - 7 = 21

2eˣ = 28

eˣ = 14 How do we isolate for x now? Well we know that aˣ=b can be converted to $x=log_{a}(b)$ .

x = $log_{e}(14)$ A shorthand for "log base e" is the natural log (ln).

x = ln(14)

x = 2.64 approx.

Exact answer: ln(14)

Approximation: 2.64

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