31. If x = (215) (sv2), then log,,X...
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31. If x = (215) (sv2), then log,,X = VÁ - VB) (log,2) + VB. The value of (A + B) equals (1) 7 (2)9 (4)11 (5)13 11

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Maths
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[ x=2^{sqrt{5}} 5^{sqrt{2}} ] on applying logarithm on botb sides On compalision with [ begin{array}{l} =(sqrt{A}-sqrt{B}) log _{10} 2+sqrt{B} A=5 B=2 end{array} Rightarrow begin{array}{l} A+B=7 end{array} ]
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