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JianEnriquez

  • one year ago

Kindly help me review with maxima and minima problems with this question

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  1. JianEnriquez
    • one year ago
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    A rectangular page is to contain 138 square inches of printable area. The margins at the top and bottom of the page are each 1 inch, one side margin is 1 inch, and the other side margin is 2 inches. What should the dimensions of the page be so that the least amount of paper is used?

  2. Loser66
    • one year ago
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    |dw:1435156728524:dw|

  3. Loser66
    • one year ago
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    |dw:1435156834748:dw|

  4. Loser66
    • one year ago
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    by replacing a = 138/b to (a+4)(b+2) to get something, then take derivative and let it =0 to solve for b.

  5. JianEnriquez
    • one year ago
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    ohhh, i get it, slr, my internet is slow

  6. Loser66
    • one year ago
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    ok

  7. JianEnriquez
    • one year ago
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    i can simplify (a+4)(b+2) first before i substitute right? and then take the derivative of that equation?

  8. Loser66
    • one year ago
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    yes

  9. JianEnriquez
    • one year ago
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    so my y prime is 4-276b^-2

  10. JianEnriquez
    • one year ago
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    my answers are \[a=2\sqrt{69}, b=\sqrt{69}\]

  11. JianEnriquez
    • one year ago
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    thanks again !

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