hostie de comique! Posted November 14, 2013 Share Posted November 14, 2013 I have found X=((I-A)^-1)(B), but in my book it says X=((I-A)^-1)(-B). Can't. figure out... Any one? Also I don't know if there is any matrix equation solver like this on the internet I have searched but it's not exactly what I want.. Thanks, exam tomorrow >< Link to comment Share on other sites More sharing options...
John Posted November 14, 2013 Share Posted November 14, 2013 Are you sure you aren't misreading the answer given in your book? Solving it one way, I get AX + B = X B = X - AX B = (I - A)X (I - A)-1B = X which is your answer. Solving it another way, I get AX + B = X AX = X - B AX - X = -B (A - I)X = -B X = (A - I)-1(-B) which is closer to the book's answer. Link to comment Share on other sites More sharing options...
mathematic Posted November 15, 2013 Share Posted November 15, 2013 It looks to me they are the same. (I-A)^-1 = -(A-I)^-1. Check your book answer. Link to comment Share on other sites More sharing options...
hostie de comique! Posted December 3, 2013 Author Share Posted December 3, 2013 Ok thanks, sorry for the long time I thought I had activated emails... Link to comment Share on other sites More sharing options...
fiveworlds Posted December 21, 2014 Share Posted December 21, 2014 (edited) Ди-Ди посмотрела на Дакса, затем на мужа. Мы боимся, что вы доставили нас сюда, чтобы. Вместо этого она дернула поводья, и Билли тотчас ее понял. Ах да, начинаю понимать. Он, должно быть, уже далеко, но я все равно проверю. Он поймал подушку, и все в ожидании затаили дыхание. Мне понадобится ваша помощь, нервно сообщила Сузанна. Изначально гостовские аптеки вдыхают удобных оплеухи реферата бронетехникой, и замарашки предназначат наподобие поэтически оспаривавшего свербежа. Опредмеченная волокита сливает. Нет, нет, не так. Александр наклонился, чтобы защитить его, но в этот момент Чезаре вонзил меч в камердинера, кровь брызнула на папское облачение и даже на его лицо. Арабский жеребец Тэмсин пугался, встряхивал головой, высоко поднимал ноги. Ршафетт Когда Салли достигла экстаза, он принял, поглотил своим ртом ее восторженный вскрик, крепко обнимая и прижимая к себе. Свадьбу назначили на последние числа октября, за четыре дня до отплытия, и у Габриэля почти не оставалось времени, чтобы провести его с молодой женой. What's the name of that story? And why does it have anything to do with maths(математика)? Edited December 21, 2014 by fiveworlds Link to comment Share on other sites More sharing options...
imatfaal Posted December 21, 2014 Share Posted December 21, 2014 What's the name of that story? And why does it have anything to do with maths(математика)? The Adventurers - Harold Robbins And not as far as I can tell Link to comment Share on other sites More sharing options...
imatfaal Posted December 21, 2014 Share Posted December 21, 2014 The second one, now hidden, was Piranhas by Robbins ! Moderator Note ALaggraree - one more post like the last two will lead to your account being suspended. Link to comment Share on other sites More sharing options...
imatfaal Posted December 21, 2014 Share Posted December 21, 2014 The Third post was back to the Adventurers. ! Moderator Note ALaggraree Your account has been suspended as a spammer - PM me in English if you wish clarification Link to comment Share on other sites More sharing options...
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