JAMIA 2025 — Mathematics PYQ
JAMIA | Mathematics | 2025If f(x)=x2+3x−4, find f(−1).
Choose the correct answer:
- A.
-2
- B.
-6
(Correct Answer) - C.
0
- D.
2
-6
Explanation
Solution
1. Given Function:
f(x)=x2+3x−4
2. Substitute x=−1:
f(−1)=(−1)2+3(−1)−4
3. Simplify the Expression:
-
(−1)2 is 1.
-
3×(−1) is −3.
So, the equation becomes:
f(−1)=1−3−4
4. Final Calculation:
f(−1)=−2−4
f(−1)=−6
Explanation
Solution
1. Given Function:
f(x)=x2+3x−4
2. Substitute x=−1:
f(−1)=(−1)2+3(−1)−4
3. Simplify the Expression:
-
(−1)2 is 1.
-
3×(−1) is −3.
So, the equation becomes:
f(−1)=1−3−4
4. Final Calculation:
f(−1)=−2−4
f(−1)=−6