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Apr
22
awarded  Teacher
Apr
22
comment Range of values of f(x) using quadratic inequalities (need intuition)
I think it does, given that I included the point for x=2; but I agree that I maybe left too much as an exercise for the reader. The value of the function approaches +infinty for x slightly more positive than -2. The value approaches -infinity for x slightly more negative than +3. The value of the function at x=2 is 0. There are no discontinuities in the range -2 < x < 3, and x goes from +infinity through 0 to -infinity in that range, so all Y are covered by the intermediate value theorem (or is it continuity theorem? I forget...).
Apr
22
answered Calculate $x$, if $y = a \cdot \sin{[b(x-c)]}+d$
Apr
22
answered Range of values of f(x) using quadratic inequalities (need intuition)
Apr
22
answered Simple question on grid