∫ x^n dx (n ≠ -1) = ?
A
x^(n+1)/(n+1) + C
B
n*x^(n-1) + C
C
ln|x| + C
D
1/(n+1) + C
Analysis & Theory
The power rule: ∫ x^n dx = (x^(n+1))/(n+1) + C for n ≠ -1.
∫ 1/x dx = ?
A
x + C
B
ln|x| + C
C
1/x + C
D
e^x + C
Analysis & Theory
The standard result: ∫ 1/x dx = ln|x| + C.
∫ √x dx = ?
A
(2/3)x^(3/2) + C
B
x^(1/2) + C
C
ln|x| + C
D
x^2/2 + C
Analysis & Theory
√x = x^(1/2). Apply power rule: ∫ x^(1/2) dx = (2/3)x^(3/2) + C.
∫ 1/√x dx = ?
A
2√x + C
B
√x + C
C
ln|x| + C
D
1/√x + C
Analysis & Theory
1/√x = x^(-1/2). ∫ x^(-1/2) dx = 2√x + C.
∫ (x^2 + 1) dx = ?
A
x^3/3 + x + C
B
x^2/2 + x + C
C
x^3 + C
D
x^2 + 1 + C
Analysis & Theory
Split: ∫ x^2 dx + ∫ 1 dx = x^3/3 + x + C.
∫ (2x + 3) dx = ?
A
x^2 + 3x + C
B
x^2 + C
C
2x^2 + 3x + C
D
ln|x| + C
Analysis & Theory
∫ (2x + 3) dx = ∫ 2x dx + ∫ 3 dx = x^2 + 3x + C.
∫ (x^2 + 2x + 1) dx = ?
A
x^3/3 + x^2 + x + C
B
x^3/3 + x + C
C
(x+1)^2/2 + C
D
ln|x+1| + C
Analysis & Theory
Expand: ∫ (x^2 + 2x + 1) dx = x^3/3 + x^2 + x + C.
∫ 1/(x^2) dx = ?
A
-1/x + C
B
ln|x| + C
C
1/x + C
D
-ln|x| + C
Analysis & Theory
1/x^2 = x^(-2). ∫ x^(-2) dx = -1/x + C.
∫ (3x^2 - 4x + 5) dx = ?
A
x^3 - 2x^2 + 5x + C
B
x^3 - 4x^2 + 5x + C
C
3x^3/2 - 2x^2 + 5x + C
D
3x^3 - 2x^2 + C
Analysis & Theory
Integrate term by term: ∫ 3x^2 dx = x^3, ∫ -4x dx = -2x^2, ∫ 5 dx = 5x.
∫ (x + 1)/x dx = ?
A
x + ln|x| + C
B
ln|x| + C
C
x^2/2 + C
D
1 + ln|x| + C
Analysis & Theory
(x+1)/x = 1 + 1/x. ∫ (1 + 1/x) dx = x + ln|x| + C.