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  1. If ( a2 + b2 )3 = ( a3 + b3 )2, then
    a
    		 +
    b
    		 is :
    ba
    1. 1
      3
    2. 2
      3
    3. -
      1
      3
    4. -
      2
      3
Correct Option: B

( a2 + b2 )3 = ( a3 + b3 )2
⇒ a6 + b6 + 3a2b2( a2 + b2 ) = a6 + b6 + 2a3b3
⇒ 3( a2 + b2 ) = 2ab

⇒
a2 + b2
 =
2
ab3

⇒
a
 +
b
 =
2
ba3


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