A partial sum of an arithmetic sequence is given. Find the sum.

1 answer:

3 0

Answer:

72.3

Step-by-step explanation:

Given that:

The arithmetic sequence:

$\sum \limits ^{14}_{k=0} (3 + 0.26k)$

The first term of the sequence $a_0$ = 3 since k = 0

i.e (3 + 0.26(0)) = 3

The last term of the sequence $a_{14}$ = 6.64

i.e (3+ 0.26(14)

= (3 + 3.64)

= 6.64

Total no of terms = 15 i.e from 0 to 14

∴

The partial sum of the arithmetic sequence = $\dfrac{Total \ no \ of \ terms }{2} \times (a_o+a_{15})}$

$=\dfrac{15 }{2} \times (3+6.64)}$

= 72.3

You might be interested in

DochEvi [55]

Answer:

2÷4 is equal to 0.5.

Take the first digit of the dividend from the left. Check if this digit is greater than or equal to the divisor.
Then divide it by the divisor and write the answer on top as the quotient.
Subtract the result from the digit and write the difference below.

Please Mark Brainliest If This Helped!

7 0

2 years ago

erastova [34]

Answer:

The estimate would be:

(one of them :)

45 (if your doing the entire number)

0 (if your rounding out of 100)

45.2 (nearest hundredth)

45.0 (nearest tenth)