Mathematics, 26.10.2019 17:43 cheylee123456

Can someone me the part c ? i don’t know why but i’m getting wrong answer! someone explain to me step by step!

Can someone me the part c ? i don’t know why but i’m getting wrong answer! someone explain to me

Answers: 2

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Answer from: babiea612

So long as R1 is greater than 2, R will be greater than 1.

Step-by-step explanation:

Denote the three resistances as R, R1 and R2.

Then:

1 1 1

= +

R R1 R2

For now, substitute 1 for R and 2 for R2:

1 1 1

= +

1 R1 2

Solve this for R1. Notice that the LCD here is 2R1.

2R1 = 2 + R1, or R1 = 2. Then we have

1 1 1

= + , which, as expected, yields R = 1.

R 2 2

Next, determine the values of R resulting from choices of R1 smaller than 2 and greater than 2:

If R1 = 1.5 (that is, less than 2), then:

1 1 1 2 + 1.5 3.5 3

= + = = . Thus, R = , which is less

R 1.5 2 3 3 3.5 than 1 and

therefore

unacceptable.

Next, let R1 = 2.1 (greater than 1):

1 1 1 2 + 2.1 4.1 4.2

= + = = . Thus, R = , which is greater

R 2.1 2 4.2 4.2 4.1 than 1 and there-

fore acceptable.

Conclusion: So long as R1 is greater than 2, R will be greater than 1.

Answer from: Quest

answer: 12

step-by-step explanation:

Answer from: Quest

The slope of the function is 0.5.
What is the slope of the function represented in the table? -.5 .5 2 -2

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Can someone me the part c ? i don’t know why but i’m getting wrong answer! someone explain to me...