When the axis of symmetry is along the x-axis the parabola opens to the
right if the coefficient of x is negative
left if the coefficient of x is positive
left if the coefficient of y is negative
right if the coefficient of x is positive
When the axis of symmetry is along the X-axis the parabola opens to the right if the coefficient of x is positive.
If n is a positive integer, find the coefficient of x−1 in the expansion of (1+x)n(1+1x)n
If n be a positive integer, then in the trinomial expansion of(x2+2x+2)n the coefficient of