MCQ
$\int e^x \cdot \sec x(1+\tan x) d x=$ __________ , $+C$.
- A$e^x \cdot \tan x$
- ✓$e^x \cdot \sec x$
- C$e^x \cdot \sin x$
- D$e^x \cdot \cos x$
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$\text{f(x)}=1,\ \text{f(y)}\neq1,\ \text{f(z)}\neq2.$
The value of f-1(1)is: