IB Mathematics AA · SL & HL
Every mark,
explained.
Photograph your handwritten solution and get it marked the way an examiner would — mark by mark, with the reason for every point you earned and every one you did not.
Correct derivative f′(x) = −2(x − h).
States the common tangent condition f′(3) = g′(3).
Rearranges correctly to h = (e + 6)/2.
Part (c) shows only f(3) = g(3); no substitution carried out.
Photograph your working
Any handwritten solution, on paper or a whiteboard. Crooked and half-finished is fine.
Marked the way IB marks
Method, accuracy and reasoning marks awarded separately, following the official mark scheme where one exists.
See what to fix
Every withheld mark says what was expected and what you actually wrote — and flags mistakes you keep repeating.
Marked against a real question bank
2,563 IB questions with their mark schemes. When your question matches one of them, you are marked against that actual scheme rather than a guess at what it might say.
Questions and mark schemes written and checked by Mehmet Petek, IB Mathematics teacher.