Question
Question: If it is known that the third term of the binomial expansion \(\left( x + x^{\log_{10}x} \right)^{5}...
If it is known that the third term of the binomial expansion (x+xlog10x)5is 106 then x is equal to-
A
10
B
10–5/2
C
100
D
5
Answer
10
Explanation
Solution
In (x+xlog10x)53rd term is 106
Ž T3 = 5C2 (x)2[(x)log10x]3 = 106
x2 ((x)3log10x) = 105
Ž x = 10