Question 457569
find the domain and range of T(t)= 2t^4 + t^2 - 1
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"Range" specifies the possible values of T(t)
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"Domain" specifies the possible values that t can take.
In this case, the domain is "all real numbers" or int can be specified as:
(-oo, +oo)
where oo is infinity
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Sometimes the expression (not in your case) has t under a radical (now you don't want t to drive it negative) OR if it has the t in a denominator (now you don't want t to drive it to zero).