A problem by Karthik Rocks
Level
pending
Let f(x) be a quadratic polynomial with f(2) = 10 and f(-2) = -2. Then the coefficient of x in f(x) is
1
3
4
2
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1 solution
f(x) = ax^2 + bx + c
10 = 4a+2b+c ......... (1)
-2 = 4a - 2b + c ........ (2)
12 = 4b
b = 3