for what value of k does the equation has a unique solution for 2x +ky =1 and 3x - 5y = 7

Chapter 2 of class 7

Formulate a linear programming model for this problem 

Solve the model by using graphical method.

the equation of the line passing through (1,2,3) and parallel to the planes x-y+_2z=5 and 3x+y+z=6, is solution

find the domain and range of f(x)=3/2-x^2

Example sums in ch 8 trignometric lesson

Example sums in 8.3

Cot (a b) prove