Question

Use a graphing calculator or online application to find the solution to 3^-x = x^3 + x to the nearest tenth. The solution is approximately x = ?

the answer is not 0.5 or 0.48

Answer 1

x = 0.5 to the nearest 1/10.

Explanation:

3^-x = x^3 + x

y = x^3 - 3^-x + x = 0

Using a graphing calculator to draw the graph of the above:

The graph crosses the x-axis at x = 0.4798

Answer 2

x≈ .5

Explanation:

x ≈ 0.479822322350589

Rounding to the nearest tenth

x≈ .5

There is either an error in the equation or the solution key