Help me please!

Question

Find the derivative (f'(x)) of the following using 4-Step Rule or Increment Method. With solution please 😭

1. f(x)=4x-1

2. f(x)=2/5x+2

3. f(x)=x7

4. f(x)= x3-4x2+2x-1

5. f(x)=x2-1

Answer 1

Problem 1.

Step 1: f(x + h) = 4(x + h) - 1 = 4x + 4h -1

Step 2: f(x + h) - f(x) = (4x + 4h -1) - (4x - 1) = 4x + 4h - 1 - 4x + 1 = 4h

Step 3: [f(x + h) - f(x)]/h = 4h/h = 4

Step 4: = 4

Do the other problems in the same way.