10. If log 2 x = a and log3 y = a, write 72^a in terms
of x and y.
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Explanation:
log 2x= a and log 3y= a
2^a=x and 3^a=y
n= a^n= m
72= 2×2×2×3×3
72^a=(2×2×2×3×3)^a
= (2^3×3^2)^a
= ( 2^3a× 3^2a)
= (2^a)^3×(3^a)^2
= x^3 y^2
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