Electronics > Beginners

Exponents

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RandallMcRee:

--- Quote from: ebastler on April 09, 2019, 03:02:13 pm ---
--- Quote from: Andrew Morton on April 09, 2019, 02:55:47 pm ---The - is part of the number, not an operator, so it's the same as -3 * -3 * -3 * -3.

--- End quote ---

Wow - it's brave to claim that, after about ten people have stated the opposite.  ;)
And I'm afraid it is wrong: https://en.wikipedia.org/wiki/Order_of_operations#Unary_minus_sign

--- End quote ---

Yeah:
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.cbclx01/artnege.htm

Wimberleytech:

--- Quote from: Andrew Morton on April 09, 2019, 02:55:47 pm ---The - is part of the number, not an operator, so it's the same as -3 * -3 * -3 * -3.

--- End quote ---

No!

metrologist:

--- Quote from: soldar on April 09, 2019, 08:48:35 am ---
--- Quote from: metrologist on April 09, 2019, 02:14:52 am --- Yes, thanks all. I see no reasonable solution to my problem.

--- End quote ---

What's your problem?

--- End quote ---

My applied calculus exam had 10 parts to solve: a bowling ball is dropped onto a table at t0. Show the derivations of the equations to, and  calculate a number of things, such as the speed of ball at impact and time; the position, velocity, and acceleration of point (x,y) on the table at time tn. You are given such things as the modulus of expansion of the table (legs considered infinitely rigid), its thickness, density, and all the other things I've forgotten that you'd need to actually solve the problem. I got all 10 parts correct and aced the course. I ranked the top fifth in my graduating class, and have both physics and applied engineering degrees.

I was trying to apply context of primary school introduction to exponents. The only question I had was the one I could not answer. I looked at it, tried to apply context, and arrived at the wrong answer.

I'm sure the image below will illustrate another failure of applied context.

tggzzz:

--- Quote from: metrologist on April 09, 2019, 03:13:54 pm ---I'm sure the image below will illustrate another failure of applied context.


--- End quote ---

Oooh, tasty.

That ranks alongside 1+2*3=9.

RPN rulesz :)

Wimberleytech:

--- Quote from: tggzzz on April 09, 2019, 03:25:25 pm ---
--- Quote from: metrologist on April 09, 2019, 03:13:54 pm ---I'm sure the image below will illustrate another failure of applied context.


--- End quote ---

Oooh, tasty.

That ranks alongside 1+2*3=9.

RPN rulesz :)

--- End quote ---

Ditto re RPN

Excel is wrong.  However, MS does tell you what rules they are following as shown in the attached from MS.

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