Find the roots of f(x)=dx^2+ex+f by completing the square.

Answers

Answer 1

Answer: Answer and workings in the attachment below.

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Which ordered pair could you remove from the relation {(–1, 0), (1, 3), (2, 2), (2, 3), (3, 1)} so that it becomes a function?

Answers

Answer:

Either of (2,2) or (2,3) should be removed to get the relation as a function.

Step-by-step explanation:

We know that a relation is a function if each element of the first set is mapped to a unique element of the other set.

i.e. corresponding to each x value we have a single y-value.

We are given a relation as:

{(–1, 0), (1, 3), (2, 2), (2, 3), (3, 1)}

As we could observe that there are two images corresponding to '2' i.e. 2 is mapped to 2 and 3 both as could be seen from the ordered pair (2,2) and (2,3).

Hence, if any one of (2,2) and (2,3) will be removed we will get our relation as a function.

Each x value should have only one y value

therefore you should remove wither (2,2) or (2,3)

The fifth term of an A.P is 40 and the seventh term is 28 more than the 3rd term. Find the first and 10th term.