Question

how to find the domain for xsquareroot(4-x^2)?

Answer 1

well, 4-x^2 cant be less than zero.

Answer 2

sqrt(-#) is verbotten

Answer 3

4-x^2 >= 0

-x^2 >= -4

x^2 <= 4

x <= +- sqrt(4)

x <= -2 and x <=2 but its wise to double check ;)

Answer 4

Dom: [-2,2] looks about right to me

Answer 5

<........-2............2............>
- 0 + 0 -

are our results right?

Answer 6

\[-2lex \ge\]

Answer 7

oops dw about that i pressed s9mething wrong

Answer 8

THANK YOU AMISTRE64