Question:
If f(t)=1-t1+t, then f'(1) is equal to:
If f(t)=1-t1+t, then f'(1) is equal to:
Show Hint
Use quotient rule carefully.
Updated On: Mar 17, 2026
- 1(1+t)²
- 1(t-1)²
- -2t(t+1)²
- -2(t+1)²
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The Correct Option is D
Solution and Explanation
f'(t)=(-(1+t)-(1-t))/((1+t)²)=-(2)/((1+t)²)
f'(1)=-(2)/((2)²)=-\frac12
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