Date | May 2019 | Marks available | 5 | Reference code | 19M.1.SL.TZ1.S_5 |
Level | Standard Level | Paper | Paper 1 | Time zone | Time zone 1 |
Command term | Find | Question number | S_5 | Adapted from | N/A |
Question
The derivative of a function f is given by f′(x)=2e−3x. The graph of f passes through (13,5).
Find f(x).
Markscheme
* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.
recognizing to integrate (M1)
eg ∫f′, ∫2e−3xdx, du=−3
correct integral (do not penalize for missing +C) (A2)
eg −23e−3x+C
substituting (13,5) (in any order) into their integrated expression (must have +C) M1
eg −23e−3(1/3)+C=5
Note: Award M0 if they substitute into original or differentiated function.
f(x)=−23e−3x+5+23e−1 (or any equivalent form, eg −23e−3x+5−2−3e) A1 N4
[5 marks]