Find the sum using the formulas for the sums of powers of integers. $\sum _ { i = 1 } ^ { 7 } \left( 5 i - 8 i ^ { 3 } \right)$
A)-784
B)-3,136
C)4,200
D)5,600
E)-6,132

Question

Find the sum using the formulas for the sums of powers of integers.   $\sum _ { i = 1 } ^ { 7 } \left( 5 i - 8 i ^ { 3 } \right)$  
A)-784
B)-3,136
C)4,200
D)5,600
E)-6,132

Quizplus · Accepted Answer

The Answer of Find the sum using the formulas for the sums of powers of integers.   $\sum _ { i = 1 } ^ { 7 } \left( 5 i - 8 i ^ { 3 } \right)$  
A)-784
B)-3,136
C)4,200
D)5,600
E)-6,132

Find the Sum Using the Formulas for the Sums of Powers