prereview2sol

prereview2sol - t = ln 2 . 09 11. (0 , 2) 12. log 5 6 = log...

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Solutions to Precalc Review Problems for Second Exam Please let me know if you can’t get any of these answers–they may not be correct! 1. I’ll go over these in or before class–I still haven’t figured out how to post images. 2. x 3 + x 2 + 3 x + 5 + 12 x - 2 . 3. 3 x 2 - 8 x - 1 + 5 x - 2 x 2 + x + 3 4. ( x + 1)( x - 1)( x - 2)(2 x - 1) 5. x = - 2 or x = 1 6. (a) 6 - i , (b) - i , (c) i 7. x = 1 2 - 5 2 i or 1 2 + 5 2 i 8. I’ll go over this in or before class. 9. 4000 ( 1 + 0 . 09 4 ) 4 . 5 = 6242 . 04 dollars, (b) t = ln(2) 4 ln(1 + 0 . 09 4 ) 10. 4000 e (0 . 09)(5) = 6273 . 25 dollars, (b)
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Unformatted text preview: t = ln 2 . 09 11. (0 , 2) 12. log 5 6 = log 6 log 5 13. Ill do these in or before class. 14. x-log x-log( x 2 + 1)-1 2 log( x 4 + 2) 15. log a bd c s r 16. x = 3-ln 16 5 , (b) x =-ln 4 17. (a) x = 3 or x =-2, (b) x = 3 2 4 (= 43046721) 18. (a) m ( t ) = 22 e-ln(2) 1600 t , (b) m (4000) = 22 e-ln(2) 1600 4000 (= 3 . 9) g, (c) 1600 ln 11 9 ln 2 (= 8 . 7) years 1...
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