Question

Evaluate the summation of negative 5 n minus 1, from n equals 3 to 12..

Answer 1

The answer is -9/4

Answer 2

The summation of negative 5 n minus 1, from n equals 3 to 12 can be expressed as

n = 3/12

substitute the value of n to the equatio

-5n – 1

-5( 3/12 ) -1

-9/4