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Question

If f(x)=∣ ∣ ∣2xx2x3x2+2x13x+12x13x25x∣ ∣ ∣ then find f(1).

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Solution

f(x)=∣ ∣ ∣2xx2x3x2+2x13x+12x13x25x∣ ∣ ∣f(x)=∣ ∣ ∣2x2x32x+213x+1213x25x∣ ∣ ∣+∣ ∣ ∣2x2xx3x2+2x03x+12x6x5x∣ ∣ ∣+∣ ∣ ∣2xx23x2x2+2x132x13x25∣ ∣ ∣f(1)=∣ ∣211414225∣ ∣+∣ ∣221304265∣ ∣+∣ ∣213313225∣ ∣=9

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