Math, asked by surajask94, 9 months ago

d=5
S9=75
Find a and a9

Answers

Answered by LEGEND28480

11

Answer:

d = 5

S9 = 75

a = ?

a9 = ?

n = 9

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

S9 = 9/2 (2a + (9-1)5)

75 = 9/2 (2a + (8)5)

150 = 9(2a + 40)

150 = 18a + 360

18a = -210

a = -35/3

Now

a9 = a + 8d

a9 = -35/3 + 40

a9 = -35 + 120 /3

a9 = 85/3

Hope it helps

Plz mark as Brainliest

Previous Question

Next Question

Similar questions

Science, 4 months ago

what is revolution.... explain it.

Science, 4 months ago

nikita took a twing of petunia plant and dipped it in a beaker contaning dissolved colour dye safranin. she left it for 1 to 2 hours now she prepared a section of this twing and observed it under the microscope. which of the following is correctly represent the TS of stem. (Note: the dark area is a place where the red colour is present)...

Math, 4 months ago

write the equation of the line parallel to the y-axis at a distance of 1 unit from the origin.

Sociology, 9 months ago

The World Wide Web is a source of information and misinformation.’ Discuss this statement with regard to the impact of internet on: (i) Parents...

Political Science, 9 months ago

NEED URGENT HELP!!!Sudheer is a journalist. He adds extra irrelevant information to his news article to make it more appealing to his viewers. Is this a responsible and ethical behaviour or is he violating media ethics? Write your views on the same.

Social Sciences, 1 year ago

in the later vedic age there was a marked change in the economic life of the Aryans in this context describe the growing importance of agriculture 2nd variety of crafts 3rd changes in the field of trade and Commerce...

Physics, 1 year ago

Ram travel the one third of the total time with velocity 40 kilometre per hour and two third of the total time with velocity 16 km per hour find the average velocity of sound in kilometre per hour and metre per second?

Math, 1 year ago

Rationalise 1/5+root2...