Solve the problem.Let f(x) = . Find all x for which f(x) ? 5.

A.  ?  
B. ?
C.
D.

Answer: D

Mathematics

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Express the integrand as a sum of partial fractions and evaluate the integral. dx

A. 2 ln  -  + ln  +  tan-1  + C
B. 5 ln  +  - ln  + sin-1  + C
C. 7 ln  + ln  +  tan-1  + C
D. 2 ln  + ln  +  tan-1  + C

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Mathematics

Simplify.(mn)-7

A. m7n7
B.
C.
D.

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Mathematics

Multiply.(-3m4z4)(5m4z2)

A. -15m8z6 B. -15mz8 C. -15m6z8 D. -15mz6

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Mathematics

I = 50 mA, E = 18 V, f = 1 MHz, and e leads i by 90ø. Use I as a reference. Find i and e at t = 0.25 æsec.

a. i = 50 mA, e = 0 v b. i = 0 mA, e = 18 v c. i = 0 mA, e = 0 v d. i = 0 mA, e = 18 v e. i = -50 mA, e = 0 v

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Mathematics