Find the coordinates of the point in the first quadrant on the ellipse $9x^{2}$ + $16y^{2}$ = 144 so
that the rectangle in the ...
a dizima periódica 5,222 é igual a
xdy/dx-y=2x²sec²2x
2log(3x+2)=log121
(1.9 $\infty$ ) $^{-2}$
(4 $y^{4}$ -8x)/(3 $x^{2}$ +x $y^{4}$ )
(x*(x-3))/2=20
find the value of k if [3,1]is the solution of the given equation 5x-3ky=18
(-0,6.....) $^{-2}$
12a+4b-6c=10
4a+7b+2d=12
-6a+11c-4d=14
2b-4c+12d=8
