NEED URGENT HELP (if any questions having missing information or can't be answered, pease just skip it but do the rest. Please don't comment incomplete question because this is all I can find from the revision task)

Q1:The demand for widgets is Q = 3 / (p0.6). When p = 4, what is the price of elasticity of demandequal to?

Q2:Givenx= (a,3, b,4) is a 1 x 3 row vector, whereaandbare some constants, what is the length of this vector?

Q4:What is the derivative off(x) =[ (e^3x) / e^3x+ 1]?

Q5:Given thatais some nonzero constant, calculate the inverse of the following matrix:

(-a2a)

(-2a-a)

Q6:Ifaandbare two nonzero parameters, what is the value of Y that solves the following system?

4x + 5y =a

3x + 4y =b

Q7:What is the value ofy'(x) , ifIn(- x+ 2y) - In(y) - 0

Q8:What isquadratic approximation of the functionf(x) = 39x2- 105x + 21atx = 1?

Q9:What is the derivative off(x) =In(x2+ 1)-2x?

Q10:Find the limit

\f\f