SOLUTION: Hello, I have completed these exercises about finding the domain and range. Are they correct? 3. y = 20 - 2x^2 Domain: (-∞, +∞) Range: (-∞, 20) 4. y = 25(-7x

Question 1196203: Hello,
I have completed these exercises about finding the domain and range. Are they correct?
3. y = 20 - 2x^2
Domain: (-∞, +∞)
Range: (-∞, 20)

4. y = 25(-7x-4)^64
Domain: (-∞, ∞)
Range: (0, ∞)
Thank you so much,
Fernando
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.

First part under #3 should be corrected.   The range is (-oo,20].

Second part under #4 should be corrected, too.   The range is [0,oo).

The rest is OK.

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