Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 1; local maximum at x = -1; concave down on (-?, ?)
B. Local minimum at x = 1; local maximum at x = -1; concave down on (0, ?); concave up on (-?, 0)
C. Local minimum at x = 1; local maximum at x = -1; concave up on (0, ?); concave down on (-?, 0)
D. Local minimum at x = 1; local maximum at x = -1; concave up on (-?, ?)
Answer: C
You might also like to view...
Solve the problem.The digits 1, 2, 3, 4, 5, and 7 are randomly arranged to form a six-digit number. Find the probability that the first and last digits are both even.
A. 
B. 
C. 
D. 
Rewrite the following number using digits.Seven billion
A. 7,000,000 B. 7,000,000,000 C. 7,000,000,000,000 D. 14,000,000,000
Solve the triangle. Round lengths to the nearest tenth and angle measures to the nearest degree.a = 6, c = 10, B = 123°
A. b = 17.1, A = 23°, C = 34° B. b = 20, A = 19°, C = 38° C. b = 14.2, A = 21°, C = 36° D. no triangle
Solve.Two tracking stations are on the equator 120 miles apart. A weather balloon is located on a bearing of 
from the western station and on a bearing of N20°E from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
A. 446 mi B. 551 mi C. 542 mi D. 455 mi