3 years ago

Find S11 for 5 + 1 + (-3) + (-7) +…

Mathematics

2 answers:

ale4655 [162]3 years ago

7 0

Known :

a = 5

b = U2 - U1

= 1 - 5

= -4

Asked :

S11 = ...?

Answer :

Sn = n/2 (2a + (n-1) b)

S11 = 11/2 (2×5 + (11-1) (-4))

S11 = 11/2 (10 + 10 × (-4))

S11 = 11/2 (10 - 40)

S11 = 11/2 × (-30)

S11 = 11 × (-15)

S11 = -165

Hope it helpful and useful :)

gregori [183]3 years ago

3 0

The answer for this is -165

You might be interested in

Sebastian answered 30 questions correctly on his multiple choice

umka2103 [35]

Answer:

50percent

Step-by-step explanation:

30 is half 60

5 0

3 years ago

Find the first term in the pattern with the formula: 40 • 6n – 1.

Arada [10]

I think 40 is the first term in the pattern.

4 0

3 years ago

Read 2 more answers

Solve for x using the diagram of circle C. B В. (3x+49) (5x-7)

Nuetrik [128]

Answer:

googl it

Step-by-step explanation:

its on googl and it has the anwser

4 0

3 years ago

C) 4 x 4 x 4 x 5 x 5 Write this using index notation

Thepotemich [5.8K]

Step-by-step explanation:

4'3x5'2

It means 4'3= 4 multiplied by its self 3 times

8 0

3 years ago

How many faces are there in cuboid

horsena [70]

Cuboid. A cuboid is a solid that has six rectangular faces--think of a typical box. All faces are either parallel or perpendicular to each other. Further, a cuboid is a right rectangular prism.

8 0

3 years ago

Read 2 more answers