Given the sequence, 26, 13, 6.5, find a) the 10th term and b) the sum of the first 18 terms X Clear * Undo Redo

Step-by-step explanation:

Given:

Sequence = 26, 13, 6.5 ....

Solving (a): The 10th term

The sequence is a geometric progression and the nth term will be solved using:

In this case:

--- Common Ratio

--- First term

So, becomes

Solving (b): The sum of first 18 terms

This will be calculated using:

Substitute values for n, a and r

Hence, the sum of first 18 terms is 51.9998016358

answer: x=3 and y=4

step-by-step explanation:

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.