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@@zelik5124 Hi, p * -5i is -5pi. I initially made a small mistake in the video and shortly fixed it afterwards. Regarding the i^2=1, I didn't seem to write this down anywhere? Unless I accidentally did somewhere (Please timestamp if that's the case) I noted i^2=-1 which is correct, are you asking where this comes from?
Hi, Yes that is indeed an error! Truthfully not sure how on earth that error popped up, I presume I input something incorrectly into my calculator and didn't give it a sense check! Thank you for pointing it out, once I've finished uploading the remaining A Level Maths videos I will likely remake this video to fix that!
Hi, I think around 4:50 on the video should help. Basically if there's more than one transformation on the y-coordinates then we must use BIDMAS. If there's more than one transformation on the x-coordinates then we must use reverse BIDMAS.
ajjmaths or anyone else that might know, for diffrentiating y=a^x since the k is equal to ln(a) why do you write ln(a^x) when you put in into diffrentiated form was that a mistake or is that for a particular reason. sorry if its obvious in new to alevel maths and please can you reply as soon as you can/are able to. thanks again for replying to my comment so fast on your other year 1 maths video too btw
Using the pearson edexcel year 1 maths textbook Do you know how they got the answer to the mixed exercise challenge part b question as to me it doesn't seem to make sense at the moment?
Hi, this is prime notation (The same as we use for differentiation) it has a different meaning here though, we use it to show a new point after a given transformation!
where did i go wrong can ajmaths or anyone here please help as soon as possible i did for the third question this: 0=-9x^-2 +1 then -1=-9x^-2 then -1/-9=x^-2 then (1/9)^2 =x and got 1/81
Hi, Your error is a result of how you've tried to deal with the indices. So it appears you've tried to square both sides to go from x^-2 to x but this is incorrect. (x^-2)^2 = x^-4 not x. You're looking for (x^-2)^(-1/2) = x, you'd then do the same for the other side. Give it a go and see if you can get to the same solution! If not let me know and I'll try my best to help you.
Oh yeah youre right i see it now thank you so much for the help and explaining it out so well and so fast especially too thats a good idea ill give it a go and youre also right in the video that he indicies can be tricky so youre right i definitely need to practice the early sections of the textbook first some more before getting too far ahead of myself thanks so much again ajmaths
Hi, if you're looking for the exam revision video for the 1st year material on vectors that can be found with this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-nZWSdY1iXew.html
Hi, Thank you for watching! We're just missing a few bits from the Year 2 playlists including some Stats and Mechanics but they will be up before the next academic year begins!
It's an inequality so it is a range of values! We're basically saying that any value strictly less than -7/16 satisfies our condition for part (c). If I had said just one particular value less than -7/16 then I would have agreed with you!
Hi, thank you for the kind words! It's worth pointing out that these videos are a little old and not quite as well produced as some of our newer material. Feel free to watch our more recent run through of A Level Maths material for example Algebraic Methods (Year 1) - ru-vid.com/group/PLgdOkMh2vFYXTckuFodn-ZlgGZjtWKQil Differentiation (Year 1) - ru-vid.com/group/PLgdOkMh2vFYW5i47HZjMdN3U8XcLKvhJH Exponential Functions & Logarithms - ru-vid.com/group/PLgdOkMh2vFYUzotfV4jjKXmpEU9PkXB7E
Hi we're currently in the process of uploading the remaining A Level Maths videos and they'll be up shortly before the start of the new academic year. We'll be sure to sort them into playlists once that's done!
Thank you for the kind words and a great question! The answer is yes we can use the binomial expansion when we have powers which are fractional or negative however we need to extend the formula here for the binomial expansion. You will cover this in the 2nd year material for A Level Maths. If you'd like to learn a little more about this we have a video on this (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4Jf_CX55Z04.html)
Is this similar in difficulty to actual A level papers because I’m in year 12 and got everything except 1, 5, 8, 12 and 14 but I thought I would get barely any of it
Thank you for watching! We're currently uploading the remaining parts of Core Pure as well as Further Stats 1 (Followed shortly by Further Pure 1) so I hope you'll find the remaining content as useful! :)
Hi, sorry for the delay in answering your question! The basic idea is that we're looking to eliminate each bracket seperately. So for example, let's say we have A(2x+1)+B(x-4)=x To eliminate the A term first (And solve for B) we need to make the bracket next to A equal zero. In that case 2x+1=0 giving a solution of x=-1/2 Doing the same with the B bracket (To solve for A) we again make the bracket next to B equal zero. In that case, x-4=0, giving a solution of x=4 I hope that helps illustrate the concept a little better!
