2
3
x
+x
9 2
1
x9
+
Choose the correct answer in Exercises 10 to 11 10 2
1
+x dx
∫
is equal to
(A)
(
)
2
2
1
1
log
1
C
2
2
x
x
x
x
+
+
+
+
+
(B)
2 23
2(1
)
C
3
+x
+
(C)
2 23
2
(1
)
C
3 x
+x
+
(D)
2
2
2
2
1
1
log
1
C
2
2
x
x
x
x
x
+
+
+
+
+
11