prereview2sol

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

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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. I’ll 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 ² 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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