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Questions  

If the 6th term in the expansion of 1x8/3+x2log10x8 is 5600, then x equals

a
1
b
loge⁡10
c
10
d
x does not exist

detailed solution

Correct option is C

It is given that 6th term in the expansion of 1x8/3+x2log10⁡x8 , 5600; therefore, 8C5x2log10x51x8/33=5600  {General term Tr+1=ncrxn-r ar }or 56x10log10⁡x51x8=5600or x2log10⁡x5=100or x2log10⁡x5=102log10⁡105or x=10

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