Math, asked by nirali974, 4 months ago

find the sum of first 15 multiplesof 8 .

Answers

Answered by rajkishorjap9

1

Answer:

VIDEO EXPLANATION

ANSWER

The multiples of 8 are 8,16,24,32…

These are in an A.P., having first term as 8 and common difference as 8.

Therefore, a=8,d=8, S15=?

Sn=2n[2a+(n−1)d]

S15=215[2(8)+(15−1)8]

=215[16+(14)(8)]

=215×128

=960 Answer....

Previous Question

Next Question

Similar questions

Physics, 2 months ago

State the law of conservation of energy? What energy changes take place when a battery is used to light up a filament bulb? Show that when a body of mass ‘m’ falls from a certain height ‘h’, the total mechanical energy remains conserved.

Math, 2 months ago

draw the symmetrical diagram whose having two lines of symmetry...

Physics, 2 months ago

Which of the following are respectively fundamental & derived units... 1) A, kg 2) N, kg 3) s, kg m/s 4) Pa, m/s ...

History, 4 months ago

how much wifes of krishna ji had ?

Math, 4 months ago

Supriya's mother is 5 years more than three times Supriya's age. If Supriya's mother is 44 years old, set up an equation and find Supriya's age (STEP BY STEP EXPLANATION)...

Math, 9 months ago

If a^2+b^2+c^2=74 and ab+bc+ca,find a+b+c.

Math, 9 months ago

if a number is selected at random from the number 14 15 16 – dash – – 77 then find the probability of the number is divisible by 7...

CBSE BOARD X, 9 months ago

match the following : (1)Font face a.upper case (2) change case. b.arial (3)page setup. c. Margin (4) picture. d.jpg. (5) header and footer. e.page number.