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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

ShivamS
2012-10-17 08:17:18

Oh, my apologies. dy/dx = 2x + a so...

bobbym
2012-10-16 11:31:20

You are correct!

anonimnystefy
2012-10-16 11:29:35

I moght be wrong, but I am getting -6 and 7 in #3.

bobbym
2012-10-16 11:27:45

He was a great mathematician.

ShivamS
2012-10-16 11:26:50

Eureka again. More discoveries then Archimedes.

bobbym
2012-10-16 11:25:43

Fourth one is correct!

ShivamS
2012-10-16 11:24:47

a=-3 and b=-6

ShivamS
2012-10-16 11:23:47

Eureka, and why?

anonimnystefy
2012-10-16 11:21:44

The second one is correct. The third one isn't.

ShivamS
2012-10-16 11:19:57

Eureka!

bobbym
2012-10-16 11:17:18

First one is correct!

ShivamS
2012-10-16 11:16:26

Homework:
What is the slope of the tangent line to the graph of y = x^3 at the point (2,8) ?
12

Consider the parabola given by the equation y = x^2 + 4x - 5. At which point on the graph of this parabola is the slope of the tangent line equal to 10?
(3,16)

The line y = 2x - 9 is tangent to the parabola y = x^2 + ax + b at the point (4,-1). What are the values of a and b?
-3,-6 respectively.

circle with equation x^2 + y^2 = 25. Which is the equation of the tangent line to the circle at the point (3,4)?
3x + 4y = 25

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