Easy question

[boggiano]

(09-09-2021 05:40 PM)Joe Horn Wrote:  

(09-09-2021 10:44 AM)boggiano Wrote:  Ok, so how I have to write an expression like this?

(x+1)^(4/5)

Exactly like that, especially if you use Algebraic Entry mode (Home Settings). If you use Textbook Entry mode instead, then you can omit the second pair of parentheses, because the 4/5 will all be in the exponent field:

\((x+1)^{\frac{4}{5}}\)

Sorry John, but I don't get it.

\((x+1)^{\frac{4}{5}}\)

with X=-2 I get an irrational number.

Instead, if I use the " classic notation" (sqrt function + power) I get the right result: 1.
I would like to continue to use this notation (it is faster to insert)