A level quotient rule question

esha06

im using quotient rule to differentiate this equation but idk how to get to what they want me to prove

(edited 3 months ago)

Reply 1

esha06

Original post by esha06

im using quotient rule to differentiate this equation but idk how to get to what they want me to prove

Reply 2

Muttley79

Original post by esha06

You have illegally simplified the bracket - you need to expand the numerator and collect like terms

Reply 3

esha06

Original post by Muttley79

You have illegally simplified the bracket - you need to expand the numerator and collect like terms

i expanded and factorised to get this but now i have an extra (4x+k)^2

(edited 3 months ago)

Reply 4

nerak99

The original error was that you cancelled a bracket (4x^2 +k) when the top and bottom were not entirely factors.

Reply 5

nerak99

It is possible that you don’t understand what the g(x) is. Essentially you have the correct bracket multiplied by some algebra which can all be subsumed into g(x)

Reply 6

esha06

Original post by nerak99

It is possible that you don’t understand what the g(x) is. Essentially you have the correct bracket multiplied by some algebra which can all be subsumed into g(x)