Răspuns :
n=7²⁶-7²⁵+7²⁴x7=7²⁵(7-1+1)=7²⁵x7=7²⁶=(7¹³)²
√(7¹³)²=7¹³
n=1+2+3+....+109-55x54
n=109x(1+109):2-55x54
n=109x55-55x54
n=55(109-54)
n=55x55
n=55²
√55²=55
√(7¹³)²=7¹³
n=1+2+3+....+109-55x54
n=109x(1+109):2-55x54
n=109x55-55x54
n=55(109-54)
n=55x55
n=55²
√55²=55