Using the quadratic equation we get:
Factoring out 2 we get
Factoring out the imaginary number:
So b.
Factoring out 2 we get
Factoring out the imaginary number:
So b.
A bookstore had 48 copies of a magazine. yesterday it sold 2/3 of them
1 answer:
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Given:
The function is
To find:
The inverse of the given function.
Solution:
We have,
Substitute m(x)=y.
Interchange x and y.
Add square of half of coefficient of y , i.e., on both sides,
Taking square root on both sides.
Add on both sides.
Substitute .
We know that, negative term inside the root is not real number. So,
Therefore, the restricted domain is and the inverse function is
.
Hence, option D is correct.
Note: In all the options square of is missing in restricted domain.
slope = -
calculate the slope m using the gradient formula
m= (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (- 3, 6)
m = =
= -
