Question

Tentukan nilai x,jika(2x+1)+(2X+2)+(2x+3)+....+(2x+50)=4.275

Answer 1

(2x + 1) + (2x + 2) +...+(2x +50) = 4.275
(2x × 50) + [(a + b) n/2 = 4.275
100x + [(1 + 50)50/2 = 4.275
100x + (51 × 25) = 4.275
100x + 1.275 = 4.275
100x = 4.275 - 1.275
100x = 3.000
x = 30