00:01
Hello students, in this problem given integral 1 to 2 x log x dx with n is equal to 4, we have to evaluate by using trapezoidal rule.
00:15
Now we know the formula for trapezoidal rule is h by 2 y naught plus yn plus 2 into y1 plus y2 plus up to plus yn minus 1 and here h will be equal to b minus a by n.
00:40
So that is equal to 2 minus 1 by 4 that is 1 by 4 and f of x is x log x and next we have to form a table value.
00:52
So here this is x and here this is f of x.
00:57
So x values are from 1 and 1 plus 1 by 4 will be 5 by 4, 5 by 4 plus 1 by 4 that is 6 by 4.
01:06
Here 6 by 4 plus 1 by 4 that is 7 by 4.
01:10
Here 7 by 4 plus 1 by 4 that is 8 by 4 that is 2 here.
01:15
So by applying the x values in f of x we have this is 0 and this is minus 0 .15.
01:21
Here 0 .26, here 0 .42, here 0 .60 and this is the value y naught, this is y1, this is y2, this is y3 and this is y4.
01:33
So by applying all the values in the formula we have integral 1 to 2 x log x dx that is equal to 1 by 2 into 1 by 4 y0 plus 0 .60 plus 2 of minus 0 .15 plus 0 .26 plus 0 .42 and simplifying we have 1 by 8 into 1 .66 and that is equal to 0 .2075...