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antoniya [11.8K]
2 years ago
11

If f(x) = 1/x^2 -1, then f(1/a+1)=

Mathematics
1 answer:
Bas_tet [7]2 years ago
8 0

Step-by-step explanation:

step 1. f(1/(a + 1)) = 1/(1/(a + 1))^2 - 1

step 2. f(1/(a + 1)) = 1/(1/(a + 1)^2) - 1

step 3. f(1/(a + 1)) = (a + 1)^2 - 1

step 4. f(1/(a + 1)) = a^2 + 2a + 1 - 1

step 5. f(1/(a + 1)) = a^2 +2a

step 6. f(1/(a + 1)) = a(a + 2)

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Will mark brainly!! :)
spayn [35]

Answer:

{f}^{ - 1} (x) =  -  \frac{1}{2} x +  \frac{7}{2}

6 0
2 years ago
Noah gathered data at his school among 7th and 8th graders to see if there was an association between grade level and handedness
mash [69]

Answer: 4) 157

Step-by-step explanation:

We know that there is no association between the grade level and the andedness, then we should find that the ratio between left handeds and right handed is the same for both grades.

In 7-th grade we have:

Left handed : 11

Right handed: 72

The ratio is 11/72 = 0.14

Then, the ratio for the 8-th graders must be about the same:

Left handed: 24

Right handed: X

Ratio: 24/X

Let's start with the bigger option, X = 157.

24/157 = 0.15

Ok, we now see that with the bigger option we obtained almost the same ratio (if we use the smaller values for X, we will get a ratio bigger than 0.15, so 0.15 is the better aproximation that we can find to the 0.14 of the 7-th graders)

Then the correct option is 4) 157

4 0
3 years ago
A circular chicken house has an area of 40m². What length of chicken wire is required to fence the house without any wire left o
Lyrx [107]
Good bless you brother I wish I can help you
8 0
3 years ago
In the question, "35 is what percent of 40?" what is the 35?
schepotkina [342]

Answer:

35 is the 'is' and 40 is the 'of'

Step-by-step explanation:

is/of = %/100

35/40 = x/100

cross-multiply to get:

40x = 3500

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4 0
3 years ago
Please Answers with steps...will be much appreciated!!!
11Alexandr11 [23.1K]
To solve the exercirses which are shown in the figure attached, you must follow the proccedure below:

 7) (x)=x³-6x²+8x
 (x)=x(x³-6x²+8)
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 The lenght is: x
 The height is= (x-4)

 8) √(2x+8)-6=4

1. You need to clear the variable "x". Then:

 √(2x+8)=4+6
 √(2x+8)=10
 (√2x+8)²=10²
 2x+8=100
 2x=100-8
 x=92/2
 x=46

 9) l4x+3l=9+2x

 1. To solve the left member, you must evaluate two cases: it could be positive,or negative. Then:

 2. Negative:

 l4x+3l=9+2x
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 -4x-2x=9+3
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 3. Positive:

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4 0
2 years ago
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