The power generated by an electrical circuit (in watts) as a function of its current x (in amperes) is modeled by:P(x)=−12x2+120xWhat is the maximum power generated by the circuit?watts
Q. The power generated by an electrical circuit (in watts) as a function of its current x (in amperes) is modeled by:P(x)=−12x2+120xWhat is the maximum power generated by the circuit?watts
Identify Parabola Direction: To find the maximum power generated by the circuit, we need to find the vertex of the parabola represented by the quadratic function P(x)=−12x2+120x. Since the coefficient of x2 is negative, the parabola opens downwards, and the vertex will give us the maximum value of P(x).
Calculate Vertex: The vertex of a parabola given by the function f(x)=ax2+bx+c is at the point (h,k), where h=−2ab. In our case, a=−12 and b=120.
Find x-coordinate of Vertex: Calculate the x-coordinate of the vertex h using h=−2ab.h=−2×−12120h=−−24120h=5
Calculate y-coordinate of Vertex: Now we need to calculate the y-coordinate of the vertex k, which is the maximum power P(h). We do this by substituting x=h into the function P(x).P(h)=−12h2+120h
Substitute x into Function: Substitute h=5 into P(h) to find the maximum power.P(5)=−12(5)2+120(5)P(5)=−12(25)+600P(5)=−300+600P(5)=300
Calculate Maximum Power: The maximum power generated by the circuit is 300 watts.
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