1. If f(x)=x²−4x+4, find f(5).

2. Evaluate: lim (x→0) (tan 7x / x).

3. Roots of x²−9x+20=0 are:

4. If log₂(8)=x, find x.

5. Evaluate: ∫ 2x dx.

6. Determinant of | 3 5 ; 6 10 | is:

7. Period of y = cos(4x) is:

8. Derivative of sin²x is:

9. Solve: d/dx (e^{3x}).

10. The sum of first n natural numbers is: