if f=2X-5 and g(x) = 7x3
To find the value of f when g(x) = 7x^3, we need to substitute the expression for g(x) into the equation for f and solve for x.
Given:
f = 2x - 5
g(x) = 7x^3
To solve for f, we need to substitute 7x^3 for g(x) in the equation for f:
f = 2x - 5
f = 2(7x^3) - 5
Now we have a new equation for f in terms of x. To solve for f, we need to simplify the equation:
f = 14x^3 - 5
Therefore, the value of f when g(x) = 7x^3 is f = 14x^3 - 5.