9^21 + 9^22 + 9^23 =
I don't have OA. I did 9^21( 1 +1 + 2) = 9^21 * 4 = 9^21 * 2^2. I tried to manipulate this to get to the right answer but could not !!!!!!
Any Thoughts ?
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How do I get ( 1+9+81) when I factorize 9^21 ?adam15 wrote:I actual you need to factorize the 9^21(1+9+81)=91*9^21
Thanks