Math Answers

Check whether the function f : R2 to R defined by f(x,y)=2x^4 -3x^2y +y^2 has an extrema at(0,0).

Arc cosx + arc cosy + arc cosz = π and if; x+y+z=3/2 then show that x=y=z

f l = 12 cm and m = 5 cm, what is the length of n?

How many significant figures are there in the result of this question.
(4.321/2.8) x (6.9234x10 5) <-- 10 to the power of 5

if i toss 2 coins at the same time for 60 times, what will be the probability distribution of heads or tails occuring per toss?

USING THE BINOMIAL THEROM,DEVELOP (x+h)^-1/2 to four terms TIA :)?

Solve the following ODE using the power series method:
(x+2)y"+xy'-y=0

If you randomly drew a card from a standard deck of cards, you will get a card that is either red (R) or black (B). The card will also either be a number card (N) or a face card (F). Determine the n(B^C)

Solve the following differential equation
(D-1)^2(D^2+1)^2y=sin^2(x/2)+e^x+x

Every secretary in a large company has been given the same assignment. the time to completion is normally distributed with mean time 90 minutes and standard deviation 12 minutes.
determine the probability a secretary will take more than 110 minutes
the probability a secretary will take between 85 to 90 minutes to complete assignment