>>63688These are all relatively easy. I will only give you some hints.
1. Which of the equations describes a straight line? Which a quadratic curve? Which a cubic curve?
Passing through (3,0) means that inserting x=3 and y=0 gives a correct solution.
2) You need to compute the scalar product of the first row (4, p) and the given column (5, -2). The result must be equal to 11.
3)
a^x a^y = a^(x+y)
a^x b^x = (ab)^x
(a^x)^y = a^(xy)
a^(-x) = 1/(a^x)
nth root of a = a^(1/n)
Learn these rules and remember that you can only apply the first if the basis is the same and the second if the exponents are the same.
4) Easy algebra. Repeat the parts if you can't do these.
5) I hate such questions. Just assume that the second line reads:
It holds that 0 <= f(x) <= 8 for every x in the domain of f(x).
(a) the zeroes can be read from the sketch
(b) the maximum lies exactly in the middle of the zeroes as for any other parabola.You can't give the y-coordinate since you only know that y <= 8.
(c) Easy again.
