Question

aratati ca 4 la puterea 76+4 la puterea 75 +4 la puterea 74=21×4 la puterea 74 va rog ajutatima dau coroana vreau toata calcula​

Answer 1

 

$\displaystyle\bf\\4^{76}+4^{75}+4^{74}=\\\\=4^{74+2}+4^{74+1}+4^{74}=\\\\=4^{74}\times4^2+4^{74}\times4^1+4^{74}=\\\\=4^{74}\Big(4^2+4^1+1\Big)=\\\\=4^{74}\Big(16+4+1\Big)=\\\\=4^{74}\times 21=\\\\=\boxed{\bf21\times4^{74}}$