Question
Question: The solution of \(\log _ { \sqrt { 3 } } x\)+ \(\log _ { \sqrt [ 4 ] { 3 } } x\) +<img src="https:/...
The solution of
log3x+ log43x ++ …+
= 36 is
A
x =3
B
x = 4 3
C
x = 9
D
x = 3
Answer
x = 3
Explanation
Solution
logx31+ logx431 +logx631+…+ logx1631 = 36
21logx31 + 41logx31 + 61logx31 +…+ 161logx31 =36
= logx31[2+4+6+….+16] = 36
= log3x(28{2+16})=36 ̃ log3x =21; x = 31/2 =3