Find the indicated coefficient or term.The coefficient of x8 in the expansion of (x2 - 3)7
A. 945
B. -2835
C. 2835
D. -945
Answer: D
Mathematics
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Find the derivative of the function at the point p in the direction of a.f(x, y, z) = x4z - y2z2, p = (2, -5, 1), a = 2i + 2j - k
A. 17
B. 50
C. 
D. 
Mathematics
Find the sum Sn of the first n terms of the geometric sequence. 
, 
, 
, 
, 
, . . . ; n = 12
A. 132857
B. 132859
C. 
D. 132860
Mathematics
Use Newton's method to find an approximate answer to the question. Round to six decimal places.Where are the inflection points of f(x) = 
x4 + 
x3 - 5x2 + 7 located?
A. x ? -1.169188, 0.407283 B. x ? -1.170422, 0.907283 C. x ? -0.919188, 0.657283 D. x ? -1.058077, 0.296172
Mathematics
Solve the problem.Last week, Samantha ran 21 miles. This week, she ran 19
miles. How much more did she run last week?
A. 1
miles
B. 1
miles
C. 40
miles
D. 25 miles
Mathematics