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Q.

The values of b and c for which the identity f(x+1)f(x)=8x+3 is satisfied where f(x)=bx2+cx+d are

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a

b=4,c=1

b

b=1,c=4

c

b=1,c=1

d

b=2,c=1

answer is B.

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Detailed Solution

f(x+1)f(x)=8x+3
b(x+1)2+c(x+1)+dbx2cxd=8x+3
bx2+b+2bx+cx+c+dbx2cxd=8x+3
2b=8 and b+c=3  b=4 and 4+c=3  c=1 b=4  and c=-1

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