exam
Maths Puzzle
Numerical Ability
If f(x)= x^2 + 5, find f(a + h) - f(a).
I haved tried to work this problem and the answer I got was 2ah + h^2 + 10, but it is not correct.
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exam Other Question
the height of a triangle is five feet less than two times the base. If the area is 75 square feet find the base and height.
hope someone could help
(-i)^4 "i" is an imaginary number
What is the correct solution?
1. i
2. -i
3. 1
4. -1