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In this math activity, we arrange three math expressions from smallest to largest. We evaluate the expressions: 2 cubed minus 2, 2 squared plus 3 to the power of 0, and 3 squared. We find their values to be 6, 5, and 9. The correct order is 5, 6, and 9.
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- My main question is why is anything to the power of 0 equal to 1?(I watched the videos a lot but still don't understand.I even PAY ATTENTION.)(13 votes)
- I like to think of it this way. 2^0 can be answered as 1 multiplied by two, zero times. The number one is not being multiplied by anything, not even the number zero. So the answer is the number one (1).(4 votes)
- Everytime! Every video i look at is infected with these stuff that is not related to the video!!(4 votes)
- please! everyone who is doing these stuff has to stop! Its harder for people to concentrate! There are THOUSANDS of apps you can use to chat and you guys all decide to use THIS. Which isn't even supposed to exist for this purpose!(9 votes)
- Sal:Here we have 3 to the 0th power, which is clearly equal to 1.
Me, thinking that anything to the 0th power is 0: ...Clearly?(3 votes)
- i keep thinking that 3 to the power of 0 is 3 but i know its not but keep forgeting that its 1 how is it 1?(4 votes)
- It is because exponents represent repeated multiplication. Anything to the power of 0 equals 1. This ultimately means that the value always ends up being divided the same amount of times it was multiplied. 3^0 means, after you multiply by 3 a specific number of times, you are going to have to divide by 3 the same number of times. So regardless of whether you get to multiply by 3 one time, two times, dozens of times, hundreds of times, thousands of times, trillions of times, or even so many times that we can not imagine, every multiple is instantly removed and the only factor that remains is 1.(4 votes)
- is 0^0= undefined? or just 0(4 votes)
On a different video, Sal says that 0 raised to the power of 0 is left undefined. In this video, he says it equals 1. Did he just pick it? Was it specified in the question?(2 votes)
- It depends on who you talk to. Some people say that 0^0 is 1, some people say it’s 0, and some people say it’s undefined. The most common thing I’ve heard people say is that 0^0 is 1. If you put this into a calculator, then it will say 1. (I know Google and the Khan Academy calculators say this)(7 votes)
- Math is so Hard pls give me an answer to 25(4*9)+(63*2)(4 votes)
- How do you solve 1^-1, 1^-2, 1^-3, 5^-1, 5^-2, 5^-3?
Thank you so much if anyone could help out!
Thanks to Khan Academy for this awesome explanation video and for whoever that answers my question!(3 votes)
- [Instructor] So we are asked to order the expressions from least to greatest and this is from the exercises on Khan Academy and if we're doing it on Kahn Academy, we would drag these little tiles around from least to greatest, least on the left, greatest on the right. I can't drag it around 'cause this is just a picture, so I'm gonna evaluate each of these, and then I'm gonna rewrite them from least to greatest. So let's start with two to the third minus two to the first. What is that going to be? Two to the third minus two to the first. And if you feel really confident, just pause this video and try to figure out the whole thing. Order them from least to greatest. Well two to the third, that is two times two times two, and then two to the first, well that's just two. So two times two is four, times two is eight, minus two, this is going to be equal to six. So this expression right over here could be evaluated as being equal to six. Now, what about this right over here? What is this equal to? Well let's see, we have two squared plus three to the zero. Two squared is two times two and anything to the zero power is going to be equal to one. It's an interesting thing to think about what zero to the zeroth power should be but that'll be a topic for another video. But here we have three to the zeroth power, which is clearly equal to one. And so we have two times two plus one. This is four plus one, which is equal to five. So the second tile is equal to five. And then three squared, well three squared, that's just three times three. Three times three is equal to nine. So if I were to order them from least to greatest, the smallest of these is two squared plus three to the zeroth power. That one is equal to five, so I'd put that on the left. Then we have this thing that's equal to six, two to the third power minus two to the first power. And then the largest value here is three squared. So we would put that tile, three squared. We will put that tile on the right, and we're done.