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Question

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

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Solution

Que. f(x)=∣ ∣ ∣2xx2x3x2+2x13x+12x13x25x∣ ∣ ∣, then f(1)
f(x)=2x(5x(3x+1)(13x2))x2(5x(x2+2x)2x(3x+1))+x3((x2+2x)(13x2)2x)
=2x(5x(3x9x3+13x2))x2(5x3+10x26x22x)+x3(x23x4+2x6x32x)
=2x(2x+9x3+3x21)x2(5x3+10x2622x)+x3(3x46x3+x2)
=4x2+18x4+6x32x5x510x4+6x4+2x33x76x6+x5
f(x)=3x76x64x5+14x4+8x3+4x22x
f1(x)=3×7x66×6x54×5x4+14×4x3+8×3x2+4×2x2
f1(x)=21×x636x520x4+56x3+24x2+8x2
f1(1)=213620+56+24+82
=79+88
f1(1)=9

1131948_1250036_ans_827288fc404e4155aacc5c60bfda9c11.jpg

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