√49/<span><span>√</span>121=7/11
√0.64/√144=1/15
√3.61/√576=19/240
√784/√0.04=`140
</span>
cos A = √15/4 А=arccos (√15/4)
x,y - целыe числа
x-2 - делитель 101
x-2=-101⇒x=-101+2=99 и y=3+101/(-101)=3-1=2
x-2=-1⇒x=-1+2=1 и y=3+101/(-1)=3-101=-98
x-2=1⇒x=1+2=3 и y=3+101/1=3+101=104
x-2=101⇒x=101+2=103 и y=3+101/101=3+1=4
Ответ:
x=-99, y=2
x=1, y=-98
x=3, y=104
x=103, y=4