Recent content by Harry2

Thank you! I was constantly getting the wrong answer. - - - Updated - - - Why though do you factorise the u^.5. Can't you just square it?

Hi, I don't understand how to get to the answer of the question. The cubic equation x^3 + 3(x^2) +2 =O.by using substitution X=1/(u^0.5) get 4u^3+12u^2+9u-1 =0. I can't see where the 12 comes in It's question 10i

Hey, What is r-1/r! And sow it is equal to 1/(r-1) -1/r! Thanks in advance.

I just thought you couldn't use the right hand side first because it was a show that question. Thanks both of you!

Hey, Please may someone help me. How can I show that 3r(r+1) is equal to r(r+1)(r+2) - r(r-1)(r+1) and then I would find the total sum of r(r+1). Thanks in advance for any help.