A-LevelMathematicsIntegration9709/12 · Oct/Nov 2018 · Q24 Marks
Showing all necessary working, find ∫₁⁴ (√x + 2/√x) dx.
- (a)Showing all necessary working, find ∫₁⁴ (√x + 2/√x) dx.[4]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.
- [B1] Integrate → x^(3/2) / (3/2)
- [B1] + 2x^(1/2) / (1/2) (+C)
- [M1] Evidence of 4 and 1 used correctly in their integrand ie at least one power increased by 1.
- [A1] Allow 8.67 awrt. No integrand implies use of integration function on calculator 0/4. Beware a correct answer from wrong working.
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