Evaluate the expression  figure 1.png)
and write the result in the form a + bi.
(a) -1
(b) 1
(c) i
(d) - i
(e) none of these
(d) - i
Mathematics
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Find a polynomial function of lowest degree with rational coefficients that has the given numbers as some of its zeros.5i, 
A. f(x) = x4 + 20x2 - 125 B. f(x) = x4 + 40x2 + 125 C. f(x) = x4 - 20x2 - 125 D. f(x) = x4 - 40x2 + 125
Mathematics
Evaluate the expression for the given replacement values.x2 for x = -1.6
A. -25.6 B. -3.2 C. 2.56 D. -2.56
Mathematics
Write the expression as a pure imaginary number.
A. -2i
B. 2i
C. ±2
D. -
i
Mathematics
Write the expression in expanded form.loga 
A. loga x4 + loga(x + 5)-3 - loga(x - 2)2
B. 4 loga x - 3 loga(x + 5) - 2 loga( x - 2)
C. 4 loga x + 
loga (x + 5) - 2 loga(x - 2)
D. loga x4 + loga(x + 5)1/3 - loga(x - 2)2
Mathematics