Find the value of 'a' in the equation a3+a = 130

Answer :

We have   : a3  +  a =  130   ,

And we know 

23  =   8

33 =  27

43 =  64

53 =  125

63 = 216 

So, we can say that value of a is less than 6  

SO, We check for a  =  4 , we get

43 +  4  =  64  + 4  =  68

Now We check for a  =  5 , we get

53 +  5  =  125  + 5  =  130

SO,

a  =  5                                                                                       ( Ans )
 

  • 2
What are you looking for?