السلام عليكم ورحمة والله وبركاته
لو سمحتو ابغا عندي مسالة لوحدة حلها الدكتور وكله تمام التمام
بس في الاخير مو عارفة كيف طلع الحل بلييز اللي يعرف يبلغني لا تتاخرو عليا سؤالي في اخر السؤال من كيف طلعت قيمة الـx اكبر او تساوي 47%

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Q2. You have an application program, MyFavApp
, that runs in 43 minutes on your IBM Model-10 computer. IBM has two new models that they are offering to sell to you. Model-30 is a machine like Model-10, but 3 times faster. The second machine, Model-10SQ is a Model-10 machine with an enhanced square root unit that speeds up square root operations by a factor of 10. How much of MyFavApp would be spending on the square root operations on Model-10 machine, for the Model-10SQ to beat Model-30.

Solution ( الحل )

Let x be the fraction of time spent on square root operation on Model-10 machine

Rest of the time spent on other operations = 1 – x

Speedup for Model-10SQ =

1 على (1-x) + (xعلى 10 << مو راضي يطلع لي الكسر

For Model-10SQ to beat Model-30
على (1-x) + (xعلى 10 اكبر اوتساوي 3
x اكبر او تساوي 74%

سؤالي من فين جات 74%
وشكرا

 

 

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