A={x `in` R/2^x+3^x-13*6^x=0} what is sum of x^2? x `in` A



Asked on

1 Answer | Add Yours

aruv's profile pic

Posted on (Answer #2)

Define a function

`f(x)=2^x+3^x-13 xx 6^x`

The zero of the function f(x) s the root of the equation


``Observe from above graph x=-2 is zero of f(x)




Thus `x^2=(-2)^2=4`  and `-2inR and -2inA` .

Thus Ans=4

We’ve answered 287,672 questions. We can answer yours, too.

Ask a question