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hjlf
3 years ago
14

Consider the curve y=ln(3x-1).let p be the point on the curve where x=2.

Mathematics
1 answer:
Eduardwww [97]3 years ago
4 0
A. Yes you are correct that the gradient at any point is 3/(3x-1). However at point P it would be 3/(3*2-1)=2/5
b. The gradient of the normal would therefore be -5/2
We can use the general formula of an equation to get y-ln(5)=-5/2 (x-2)
Now multiply both sides by 2 to get:
2y-2ln(5)=-5x+10
Now when it crosses the x axis we know that y=0 therefore:
5x=10+2ln(5)
Therefore:
x=2+2/5 ln(5) when y=0
You could find an estimate of this number to be 2.64 (3sf) but this might not be sufficient

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A fair eight-sided die with the sides numbered 1 to 8 is rolled twice.
ryzh [129]

A - rolling an odd prime number followed by an even prime number

B - two numbers are consecutive numbers in ascending order


|\Omega|=8^2=64\\\\ |A|=\underbrace{3}_{\text{3,5,7}}\cdot\underbrace{1}_{\text{2}}=3\\ |B|=\underbrace{7}_{\text{(1,2),(2,3),\ldots(7,8)}}\\\\\\ P(A)=\dfrac{3}{64}\approx5\%\\ P(B)=\dfrac{7}{64}\approx11\%

4 0
4 years ago
Given the equation y=4x-3, if x increases by 2 unit, what is the corresponding change in y
shutvik [7]

y increases by 8

given y = 4x - 3 then an increase in x of 2 units gives

y = 4(x + 2) - 3 = 4x + 8 - 3 = 4x + 5

change in y = 4x + 5 - (4x - 3) = 4x + 5 - 4x + 3 = 8


3 0
3 years ago
I need help with this please
uranmaximum [27]

Answer:

Supplementary: 126 degrees ( 180-54)

Complementary: 47degrees (90-43)

Hope it helps!!!

3 0
3 years ago
Please help 20 points
S_A_V [24]

Answer:

can you post a clearer picture ?

Step-by-step explanation:

6 0
3 years ago
The perimeter of a rectangle is 42 inches. If the width of the rectangle is 6 inches, what is the length?
ad-work [718]

Answer:

The answer is 7

Step-by-step explanation:

It is 7 because when you multiply 6  times 7 equals 42 so the answer is 7

6 0
4 years ago
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