To find the value of the sum:
S=∑n=110(n(n+1)(n+2)528)
We can express the general term Tn using partial fractions via the method of differences (telescoping series).
Notice that the numerator of the fractional part can be rewritten as:
n(n+1)(n+2)1=21[n(n+1)(n+2)(n+2)−n]
Splitting the fraction gives:
n(n+1)(n+2)1=21[n(n+1)1−(n+1)(n+2)1]
Substituting this back into the general term Tn:
Tn=2528[n(n+1)1−(n+1)(n+2)1]=264[n(n+1)1−(n+1)(n+2)1]
Now, summing Tn from n=1 to n=10:
S=264∑n=110[n(n+1)1−(n+1)(n+2)1]
Expanding the sum gives a telescoping series where intermediate terms cancel out:
S=264[(1⋅21−2⋅31)+(2⋅31−3⋅41)+⋯+(10⋅111−11⋅121)]
All terms except the first and the last cancel out:
S=264(1⋅21−11⋅121)
Simplify the expression inside the parentheses:
S=264(21−1321)
S=264(13266−1)=264(13265)
Since 132264=2:
S=2×65=130
Hence, the correct option is B (130).