The cost price of 25 articles is equal to the selling price of 20 articles. What is the gain or loss percent?​

If A+B=, [2/3 3/0] and A-B =[5/2 3/1] then Matrix A is ​

6⅔ find the factor.

If A {x:x is a factor of 42 }
B = {x:x is a factor of 54}
Then find AUB, AnB, A-B and B-A.​

Write the power set of the following set B={x,y,z}​

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\) using this solve the equation .

9x^2+2x+8=0.

Find the value of integration:

\(\int\frac{sinx+1}{1-cosx}dx\)

Evaluate the  integration

\(\int\frac{sinx+2x+1}{cosx+4x+2}dx\)

Curie is the unit of_____?

Who was the inventor of Radar?