Bug in solving simple equations with decimal exponents

tork73 shared this problem 4 years ago
Answered

The following equation needs a starting value for x if GeoGebra is going to solve it.


700=0.06* x^1.093


It is easy to solve the equation by hand (except for calculating the power), so it should be easy for GeoGebra...


I use GeoGebra 5.0.170.ae9baa7782b1e28d01a039d9a96e68b6

Comments (3)

photo
1

If you look at the answer for

    Solve[700=0.06* x^1.09]

then you will see why it has trouble with

    Solve[700=0.06* x^1.093]


NSolve needs a starting value for non-polynomials

photo
1

Ok, but it can be a little bit confusing when NSolve does not need x-value for some other kind of equations. For example 5^(x^2-2)=25 will be solved width the command

    NSolve[5^(x^2-2)=25]

.


I wish this would work:

    NSolve[700=0.06* x^1.093]

photo
1

Please try 5.0.173.0 :)

© 2020 International GeoGebra Institute