Really thank you to this channel.I’m an asian student.yea you know how they give us hard homework and exercises like this.And they teaching so bad.You are a really good math teacher💗And also if this is only an exercise,How hard will the test be💀💀
I love the algebra that you used to get the exact answer. If you input that answer into a scientific calculator, you get 0.942 which is .005 greater than your answer. It is quicker to directly input the exact answer into a calculator and your answer is more accurate.
Well, most part of the difference between 0.937 and 0.942 comes from a bit sloppy approximation. Log 2 with 3 significant digits is 0.301, not 0.3. Counting thoroughly with 3 significant digits but waiting until all the algebraic simplifications are done would yield 0.941. But, as you say, why not just put all of the simplified algebra into the calculator and get only one rounding error, to the precision of your choice?
There's nothing complicated there. Just the basic properties of logarithms and powers. All this takes place in a regular school. What's so complicated?🤣
Φ^2-Φ-1=0 is the Golden Ratio equation with positive solution (√5+1)/2 φ^2+φ-1=0 is the Inverse Golden Ratio equation with positive solution (√5-1)/2 Φφ=Φ-φ=1
Basic math is necessary (addition & subtraction). All other levels of math were created for the purpose of confusion. It is just one of the many levels of the matrix.
Depends on your need, imagination and application. All of us studied volume is equal to lbh. But I had a real time occasion while laying the roof concrete measuring 2100 sft.. My Engineer wanted me to buy another load of quarter inch jalli which cost ₹3600 when my gross salary was around the same figure. I refused to buy. He warned me that in Case of shortage there will be a Gaping whole. I promised to get required small quantity at short notice paying heavy price.,The work started and got completed leaving enough stone for the stairs. Engineer wanted to know how I calculated. I am only a former teacher of English. I told that i made adjustment for the volume of pvc pipes, steel rods and wires and mainly the large quantity of water used in preparing the cement concrete mixture. He admitted to have made a straight calculation without considering the scope for such adjustment. Person wearing the shoe knows where it pinches. I didn’t want to lose money equivalent to my one month salary. Moral: Necessity is the mother of all invention.
Never use x to stand for multiplication when you also use x as a variable. NEVER!! Second, if doing a presentation or teaching a class, do not allow a minus sign to "run into" the expression that follows it. Third, do not do partial calculations on your calculator, write them down on paper, and reenter them later to do further calculator work; that is a baby way of using a calculator. Rather, do your calculator work in one continuous "sweep" of calculator strokes at the very end.
A B and C are the coefficients of y^2, y, and the constant. You can think of it like (1)x(y^2)+(1)x(y)+(-1) so A=1, B=1 and C=-1 If the equation was something like 6y^2+2y+5 then A, B, and C would be; A=6, B=2 and C=5
According to the formula for calculating the discriminant of a quadratic equation: D=b^2-4ac. Hence x1, x2 =(-b+/-√D)/2a. This is done in school or did you not study there?😊
Because you kept the logs of your other numbers to 3 decimal places, the log 2 should be 0.301 not just 0.3. The resulting numerator should be 0.207 and 0.207/0.222=0.932
unnecessary making it critical. at one point you reached x sq+ x is equal to x to the power zero. if you divide by x , it will be x plus one is equal to zero. this means x is equal to minus one.
9^x+15^x=25^x 9^x/9^x+15^x/9^x=25^x/9^x 1+(15/9)^x=(25/9)^x 1+(5/3)^x=(5/3)^2x t=(5/3)^x 1+t=t² t²-t-1=0 t=(1+-√(1+4))/2 t(1=(1+√5)/2 t(2=(1-√5)/2 This solution is rejected because It is negative. So, (5/3)^x=(1+√5)/2 log(5/3)^x=log(1+√5)/2 xlog(5/3)=log(1+√5)-log2 xlog5-log3=log(1+√5)-log2 x=(log(1+√5)-log2)/(log5-log3)
You are not bragging but false claiming. It is all almost impossible to get the right approximation in a few seconds. Assuming that you have log2, log3 log5 values in your head, you will still need to do 3-digit number division. Of course, this video is NOT for smart people. I could not imagine why the speaker wrote the equation the 2nd time. That only showed he is not confident. It is also hard for me to watch his repeatedly writing “x=“.
