Question

41. (2) ( 5 a+frac{1}{3 a}=5 )
On multiplying by ( frac{3}{5} )
( 3 a+frac{1}{5 a}=5 times frac{3}{5}=3 )
On squaring,
( 9 a^{2}+frac{1}{25 a^{2}}+2 times 3 a times frac{1}{5 a}=9 )
( Rightarrow 9 a^{2}+frac{1}{25 a^{2}}=9-frac{6}{5}= )
( frac{45-6}{5}=frac{39}{5} )

# 41. If5a + =5, the value of 90

Solution