Thread: integration using partial fraction please can can someone check my working

. What is the exact value of ? Give your answer as a fraction or whole number

I have spilt this into partial fractions, and got



which gives
A=1
B=-1

so I have



so now integrating i get





I than evaluate this answer from 3-0 and i get

so I get 0.0936

According to your original post, the question was "What is the exact value of k? Give your answer as a fraction or whole number". ln(7/8)- ln(4/5)= ln((7/8)(5/4))= ln(35/32).

Don't forget what the problem asked while doing the work! Your answer to this question should be "k= 35/32".

Tahnk you, but the correct answer is 1.09357, I dont know where i went wrong

Originally Posted by Tweety

Tahnk you, but the correct answer is 1.09357, I dont know where i went wrong

after integration you end up with

this should give you k = 1.09357

You might notice that 35/32 = 1.09375. I'll bet the 7 and 5 got reversed somewhere, so HallsofIvy's answer is exactly correct, just in a fraction instead of a decimal.

- Hollywood