Mathematics → GRE Mathematics → GRE Mathematics Subject Test Practice Questions
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11. The Differentiation of y = xex is?
(A) y = xex + lnx
(B) y = xex[ex + exlnx]
(C) 
(D) y = xexlnx + ex
(E) y = xexlnx + xex
12. Calculate
(A) 
(B) 
(C) 
(D) am–n
(E) a
13. For what value of k will the vectors (1, –2, k) in R3 be a linear combination of the vectors (3,0, 2) and (2, 1, 5) ?
(A) 0
(B) 4
(C) –4
(D) 8
(E) –8
14. Let X be a nonempty set of real numbers. Any number u such that u ≥ x for every x in X is called an upper bound for X . Then which from the following is/are true?
I. u is the least upper bound if no number smaller than u is an upper bound for X
II. u is the greatest lower bound if no number larger than u is a lower for X
III. u is the only least upper bound of X
IV. u is the only Greatest lower bound of X
(A) None
(B) I only
(C) II only
(D) I and III
(E) II and IV
15. In a football tournament there are 8 teams and each team has to play 1 match against every other team. What is the total number of matches?
(A) 26
(B) 28
(C) 30
(D) 32
(E) 34
ANSWERS: GRE MATHEMATICS SUBJECT TEST PRACTICE
11. C
12. A
13. E
14. D
15. B