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Find the 
y-coordinate of the 
y-intercept of the polynomial function defined below.

f(x)=5x^(3)-7x-1-6x^(2)
Answer:

Find the y y -coordinate of the y y -intercept of the polynomial function defined below.\newlinef(x)=5x37x16x2 f(x)=5 x^{3}-7 x-1-6 x^{2} \newlineAnswer:

Full solution

Q. Find the y y -coordinate of the y y -intercept of the polynomial function defined below.\newlinef(x)=5x37x16x2 f(x)=5 x^{3}-7 x-1-6 x^{2} \newlineAnswer:
  1. Evaluate at x=0x = 0: To find the yy-coordinate of the yy-intercept of the function f(x)f(x), we need to evaluate f(x)f(x) at x=0x = 0, because the yy-intercept occurs where the graph of the function crosses the yy-axis, and the xx-coordinate of any point on the yy-axis is yy00.
  2. Substitute x=0x = 0: Substitute x=0x = 0 into the polynomial function f(x)=5x37x16x2f(x) = 5x^3 - 7x - 1 - 6x^2 to find the y-coordinate of the y-intercept.\newlinef(0)=5(0)37(0)16(0)2f(0) = 5(0)^3 - 7(0) - 1 - 6(0)^2
  3. Simplify the expression: Simplify the expression by performing the calculations.\newlinef(0)=5(0)7(0)16(0)f(0) = 5(0) - 7(0) - 1 - 6(0)\newlinef(0)=0010f(0) = 0 - 0 - 1 - 0\newlinef(0)=1f(0) = -1
  4. Find y-coordinate: The y-coordinate of the y-intercept is the value of f(0)f(0), which we have found to be 1-1.

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