Answer:
2x+b
Step-by-step explanation:
f(x)=x
2
+bx−21
The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0. The derivative of ax
n
is nax
n−1
.
2x
2−1
+bx
1−1
Subtract 1 from 2.
2x
1
+bx
1−1
Subtract 1 from 1.
2x
1
+bx
0
For any term t, t
1
=t.
2x+bx
0
For any term t except 0, t
0
=1.
2x+b×1
For any term t, t×1=t and 1t=t.
2x+b
