In Problems 1 to 9, differentiate from rst principles. 1. y=x 2. y=7x 3. y=4x2 4. y=5x3 5. y=2x2+3x12 6. y=23 7. f(x)=9x 8. f(x)=

In Problems 1 to 9, differentiate from first principles. 

1. y=x 

2. y=7x 

3. y=4x2 

4. y=5x3 

5. y=−2x2+3x−12 

6. y=23 

7. f(x)=9x 

8. f(x)= 2x 3 

9. f(x)=9x2