Q. Given the function g(x)=x2+x−5, determine the average rate of change of the function over the interval −1≤x≤3.Answer:
Substitute x into g(x): We have the function g(x)=x2+x−5. To find the average rate of change over the interval [−1,3], we will use the formula for the average rate of change, which is (g(b)−g(a))/(b−a), where a and b are the endpoints of the interval.
Calculate g(−1): First, we need to find the value of g(−1). We substitute x=−1 into the function g(x).g(−1)=(−1)2+(−1)−5g(−1)=1−1−5g(−1)=−5
Calculate g(3): Next, we need to find the value of g(3). We substitute x=3 into the function g(x).g(3)=(3)2+(3)−5g(3)=9+3−5g(3)=7
Calculate average rate of change: Now we have the values g(−1)=−5 and g(3)=7. We can calculate the average rate of change using the formula (g(b)−g(a))/(b−a) with a=−1 and b=3.Average rate of change = (g(3)−g(−1))/(3−(−1))Average rate of change = (7−(−5))/(3−(−1))Average rate of change = (7+5)/(3+1)Average rate of change = 12/4Average rate of change = 3