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How many real solutions does the equation 0.2x^5-2x^3+1.8x+k=0 have when k=1?

How many real solutions does the equation 0.2x^5-2x^3+1.8x+k=0 have when k=1?
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How many real solutions does the equation 0.2x^5-2x^3+1.8x+k=0 have when k=1?

User Yehonatan
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A graphing calculator shows it has 3 real solutions, near x ∈ {-3.033, 1.241, 2.964}.

How many real solutions does the equation 0.2x^5-2x^3+1.8x+k=0 have when k=1?-example-1
User Sisi Mendel
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