What is s5 for 1000 + 500 + 250 + ?

The sum of first five term is 1937.5.

Step-by-step explanation:

The given series is

Here the first term is 1000 and each term is half of its previous term. The common ratio is

The sum of n terms of a GP is

Where, a is first term, r is common difference, r<1 and n is number of terms.

Therefore the sum of first five term is 1937.5.

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5