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Question

Let f(x)={1+2xa;0x<1ax,1x<2
If limx1f(x) exist then a is

A
1
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B
1
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C
2
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D
2
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Solution

The correct options are
B 1
C 2
f(x)=1+2xafor 0<x<1=ax for 1x<2As the function is continuous at 1 1+2a=a a2a2=0a22a+a2=0a(a2)+1(a2)=0a=1,2
Hence, options 'B' and 'C' are correct.

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