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\frac{1}{4} \int \frac {1}{s^2 +1} du = \frac {1}{4} tan^-^1 \left( s \right) +C
\frac {1}{4} tan^-^1 \left( \frac {x+1}{4} \right) +C
\frac {1}{2} tan^-^1 \left( s \right) +C
\frac {1}{2} tan^-^1 \left( \frac {x+1}{2} \right) +C
\frac{1}{4} \int \frac {1}{s^2 +1} du = \frac {1}{4} tan^-^1 \left( s \right) +C
\frac {1}{4} tan^-^1 \left( \frac {x+1}{4} \right) +C
\frac {1}{2} tan^-^1 \left( s \right) +C
\frac {1}{2} tan^-^1 \left( \frac {x+1}{2} \right) +C
\frac{1}{4} \int \frac {1}{s^2 +1} du = \frac {1}{4} tan^-^1 \left( s \right) +C
\frac{1}{2}tan^-^1 \frac {u}{2} +C
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Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
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Last reply 4 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrong71