Question

S=3/1.4+3/4.7+3/7.10+3/10.13+3/13.16

Answer 1

S = 3/(1.4) + 3/(4.7) + 3/(7.10) + 3/(10.13) + 3/(13.16)

= 1 - 1/4 + 1/4 - 1/7 + 1/7 - 1/10 + 1/10 - 1/13 + 1/13 - 1/16

= 1 - 1/16

= 15/16

Answer 2

S = 3/(1.4) + 3/(4.7) + 3/(7.10) + 3/(10.13) + 3/(13.16)

= 1 - 1/4 + 1/4 - 1/7 + 1/7 - 1/10 + 1/10 - 1/13 + 1/13 - 1/16

= 1 - 1/16

= 15/16