Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. ?
B. 1
C. 0
D. No limit
Answer: C
Mathematics
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Use logarithmic differentiation to find the derivative of y.y = x(x + 8)(x + 9)
A. x(x + 8)(x + 9)(lnx + ln(x + 8) + ln(x + 9))
B. x(x + 8)(x + 9)
C. 1
D. 
+ 
+ 
Mathematics
Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.3 - 15 + 75 - 375 + ... + (-1)n-1 3 ? 5n-1 + ...
A. 
; series diverges
B. 
; 
C. 
; 
D. 
; series diverges
Mathematics
Without using a calculator, give the exact trigonometric function value with rational denominator.cos 30°
A. 
B. 
C. 
D. 
Mathematics
Graph the ellipse and label the center.
+ 
= 1
A. C(8, 12)
B. C(8, -12)
C. C(-8, -12)
D. C(-8, 12)
Mathematics