Question

any one ... please answer my question needful​

Answer 1

Answer:

f(x)=x

2

−2x−8

to find the vertex, we know,

x=−

2a

b

=−

2×1

−2

=1

to find y coordinate, substitute the value of x in equation.

(1)

2

−2(1)−8=1−2−8=9

The vertex is (1,9)

Now, x intercepts,

x

2

−2x−8=0

(x−4)(x+2)=0

x=−2,4

The x intercepts are (−2,0),(4,0)

To find the y intercept, substitute x=0 in given equation,

0

2

−2(0)−8=−8

The y intercept is (0,−8)

Thus it is an upward facing parabola, touching x and y axis at (2,−8),(−1,−5),(3,−5)

solution

Answer 2

Answer:

Step-by-step explanation:

If A={1,3,5,7,9} and B={2,3,5,7}

B) (ii) (A U B) - (A N B)

=  ({1,3,5,7,9} U {2,3,5,7}) - ({1,3,5,7,9} N {2,3,5,7})

=  {1,2,3,5,7,9} - {3,5,7}

=  {1,2,9}