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Text Solution

`47.66``57.66``67.66``77.66`

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DSolution :

`f(x) = 3x^(2) + 15x + 5` <br> ` rArr f'(x) = 6x+15` <br> Let` x = 3 and h = 0.02` <br> Now `f(x+h) = f(x) + hf'(x)` <br> ` rArr f(3.02) = f(x) + hf'(x)` <br> ` = (3 xx3^(2)+15 xx 3 + 5)` <br> `+ 0.02 xx(6 xx3 + 15)` <br> ` = 77 + 0.66 = 77.66` .**Introduction: average rate and instantaneous rate**

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