Find the sum of the first 20 terms. 1.5,1.45,1.40,1.

Let's try to find a pattern to the sequence. You can see that we start from 1.5 and subtract 0.05 to generate the next element with each step. So, if we start from , the general formula for the n-th element is

So, the sum of the first 20 terms is

We can split the sum:

The first sum is independent of n, so we're just summing 1.5 for 20 times:

The second sum is 0.05 times the sum of the first 19 integers. The sum of the first k integers is given by

So, the sum of the first 19 integers is

and 0.05 times this sum is

So, the sum of the first 20 elements of the sequence is given by

dunno

step-by-step explanation:

the answer is the option b

the range is all real numbers

step-by-step explanation:

we know that

the absolute value parent function is equal to

see the attached figure to better understand the problem

so

a. it is v-shaped > is true

b. the range is all real numbers > is not true

because the range is the > [0,∞)

all real numbers greater than or equal to zero

c. it goes through the origin > is true

d. the domain is all real numbers > is true

step-by-step explanation: