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bekas [8.4K]
2 years ago
11

Negative number on a number line 3

Mathematics
2 answers:
MrMuchimi2 years ago
8 0
-2.1 because each dash represents 0.1
zhenek [66]2 years ago
4 0
-2.1 since each dash mark represents .1
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Given f(x)=-2x^3 + 3x^2 , find the equation of that tangent line of f at the point where x=2.
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Step 1: Find f'(x):

f'(x) = -6x^2 + 6x

Step 2: Evaluate f'(2) to find the slope of the tangent line at x=2:

f'(2) = -6(2)^2 + 6(2) = -24 + 12 = -12

Step 3: Find f(2), so you have a point on y=f(x):

f(2) = -2·(2)^3 + 3·(2)^2 = -16 + 12 = -4

So, you have the point (2,-4) and the slope of -12.

Step 4: Find the equation of your tangent line:

Using point-slope form you'd have: y + 4 = -12 (x - 2)

That is the equation of the tangent line.

If your teacher is picky and wants slope-intercept, solve that for y to get:

y = -12 x + 20

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2 years ago
Is it ever possible that cos (A−B)=cos ⁡A−cos ⁡B? Why
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  yes, there are an infinite number of solutions

Step-by-step explanation:

The attached graph shows values of A and B (x and y) that can make this equation be true. Any of the points on any of the curves will satisfy the equation. (The repetition continues indefinitely in all directions.)

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2 years ago
R varies directly as S and inversely as T. if R = 8 when S = 4 and T = 3, then R is equal to ​
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R = 6S/T

Step-by-step explanation:

R ∝ S/ T

》R = kS/ T

》k = RT/ S

If R = 8 when S = 4 and T = 3

then, k = (8 × 3)/ 4

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∴ R = (6 × S)/ T

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