Matrices and Determinants 2 Question 16

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18. If f(x)=1xx+1 2xx(x1)(x+1)x 3x(x1)x(x1)(x2)(x+1)x(x1),

======= ####18. If f(x)=|1xx+12xx(x1)(x+1)x3x(x1)x(x1)(x2)(x+1)x(x1)|,

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed

then f(100) is equal to

(1999, 2M)

(a) 0

(b) 1

(c) 100

(d) -100

Show Answer

Answer:

Correct Answer: 18. (a)

Solution:

  1. Given,

f(x)=|1xx+12xx(x1)(x+1)x3x(x1)x(x1)(x2)(x+1)x(x1)|

Applying C3C3(C1+C2)

|1x02xx(x1)03x(x1)x(x1)(x2)0|

f(x)=0f(100)=0



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