Question

a) 5^{2 _{{ 32 : [ 12 - 4 +4 (16:8)]}}}

b) S=1+2+3+...+150

c) S=2+4+6+...+100

 

Answer 1

a/ \(5^2.\left\{32:\left[12-4+4\left(16:8\right)\right]\right\}\)

\(=25\left\{32:\left[12-4+4.2\right]\right\}\)

\(=25\left\{32:\left[12-4+8\right]\right\}\)

\(=25\left\{32:16\right\}\)

\(=25.2=50\)

b/ \(S=1+2+.....+150=\frac{\left[\left(150-1\right):1+1\right]\left(150+1\right)}{2}=11325\)

Answer 2

c) S=2+4+6+...+100

      =(100+2)x50:2

      =2550