(a) How many real solutions does the equation
.2x5 − 2x3 + 1.8x + k = 0
have when k = 0?
(b) How many real solutions does it have when k = 1?
(c) Is there a value of k for which the equation has just one real solution?
(d) Is there a value of k for which the equation has no real solutions?
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