2 years ago

Please help quick! This is due tomorrow for class and I really need help! Thank you.

Mathematics

1 answer:

aleksandr82 [10.1K]2 years ago

7 0

0.8inch = 2.032
1.4inch = 3.556
2.1inch = 5.334

Sorry if its wrong had to do it fast!!!

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F(x) = 4x^2 - 3x + 2kx + 1

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$\sqrt{\Delta_k}=\sqrt{256}=16\\\\k_1=\frac{12-16}{2\cdot4}=\frac{-4}{8}=-\frac{1}{2};\ k_2=\frac{12+16}{2\cdot4}=\frac{28}{8}=\frac{7}{2}\\\\a_k=4 > 0\ (up\ parabola\ arms-see\ the\ picture)\\\\Answer:k\in(-\infty;-\frac{1}{2})\ \cup\ (\frac{7}{2};\ \infty)$