2 (x - 7)
d / 2\ --\(x - 7) / dx
Let u=x−7u = x - 7u=x−7.
Apply the power rule: u2u^{2}u2 goes to 2u2 u2u
Then, apply the chain rule. Multiply by ddx(x−7)\frac{d}{d x} \left(x - 7\right)dxd(x−7):
Differentiate x−7x - 7x−7 term by term:
Apply the power rule: xxx goes to 111
The derivative of the constant (−1)7\left(-1\right) 7(−1)7 is zero.
The result is: 111
The result of the chain rule is:
The answer is:
-14 + 2*x
2
0