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    				| 1. | If a, b, c ∈ R , and the equation ax2 + bx + c = 0 has no real roots, then (a) (a + b + c) > 0(b) a(a + b + c) > 0(c) b (a + b + c) > 0(d) c(a + b + c) < 0 | 
| Answer» Correct option (b) a(a + b + c) > 0 Explanation: a > 0 ƒ(0) ⇒ c > 0 ƒ(2) > 0 ⇒ a + b + c > 0 aƒ(1) > 0 & cƒ(1) > 0 a(a + b + c) > 0 and c (a + b + c) > 0 a < 0 ƒ(0) < 0 ⇒ c < 0 ƒ(1) < 0 ⇒ a + b + c < 0 aƒ(1) > 0 & c.ƒ(1) > 0 a(a + b + c) > 0 and c (a + b + c) > 0 | |