Add or subtract the functions, as indicated.P(x) = 7x6 + 2x4 + 20, Q(x) = 5x6 - 3x4 - 19, R(x) = x7 + 15; Find (P - Q + R)(x).
A. x7 + 2x6 + 7x4 + 16
B. 61x10
C. x7 + 2x6 + 5x4 + 54
D. x7 + 2x6 + 5x4 + 16
Answer: C
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For the initial value problem, compute the first two approximations u1 and u2 given by Euler's method using the given time step.y'(t) = 5 - y, y(0) = 4; ?t = 0.1
A. u1 = 4.1; u2 = 4.91 B. u1 = 4.9; u2 = 4.91 C. u1 = 4.9; u2 = 4.19 D. u1 = 4.1; u2 = 4.19
Find the following. Assume that letters can represent any real number.
A. Not a real number B. 8 C. 64 D. -8
The given pattern continues. Write down the nth term of the sequence suggested by the pattern.-3, 9, -27, 81, . . .
A. an = (-1)n+1 3n+1 B. an = (-1)n 3n C. an = 3n+1 D. an = 3n
Fill in the blank with one of the words or phrases listed below. Not all choices will be used.
A(n) 
is the quotient of two numbers.
A. numerator B. denominator C. ratio D. least common denominator