49^-1/2 * (1/7)^-2 + 2^-1 * (-2)^-2

Question

49^-1/2 * (1/7)^-2 + 2^-1 * (-2)^-2

Answer 1

49^-1/2·(1/7)^-2+2^-1·(-2)^-2=(1/√49)·7²+(1/2)·1/(-2)²=49/7+(1/2)·1/4=7+1/8=7и 1/8.

Answer 2

49^-1/2 * (1/7)^-2 + 2^-1 * (-2)^-2= 0,625