Find the range of the function given below. This function is defined for all real values of x. F(x) =2(x^2+5)
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Since x^2 will always return a positive value. Therefore the range will be a subset of +R (set of positive real values)
EmmaW1:
But, real numbers include negative numbers too, don't they?
Either your question or the answer has some printing mistake maybe.
Exactly, that's what I'm saying, your question and the answer you have for it are not linked at all.
No, I'm absolutely sure it's not wrong
The correct answer of the question you asked is +R (set of positive real numbers)
That's not possible. If your knowledge on domain and range is quite good, you should be able to figure it out.
Just think of how is it possible for f(x) to be greater than or equal to 10 when your x is real number values.
it's possible only when x is whole number values, which ultimately contradicts your current question then.
I think I'll view the problem again. Thank you for your help.
Sure. Welcome. :) I'm 110% sure something is wrong either with question or answer.
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