Math, asked by Shanon24072005, 27 days ago

in an AP if An=20 S!n=399 then Sn-1=
1)379
2)340
3)342
4)361

Answers

Answered by zakianaaz632

1

Answer:

(4)361

Step-by-step explanation:

step by step explanation

Answered by kashishsainitulip

0

Answer:

4. ( 361)

Step-by-step explanation:

73-4;74+!$!$+#8+137+3!4;;$

Previous Question

Next Question

Similar questions

English, 13 days ago

your online classes are going from 7:30 to 11:30 at present write a letter to the principal of your school requesting him or her for 30 minute break after third period for breakfast give reason of your request...

French, 13 days ago

nommez deux L'empereur de France...

English, 13 days ago

And hope last turn will be the best identify the figure of speech If you don't no the answer don't give unneccery answer it very very very very very important ...

Math, 27 days ago

can anyone solve ut ا...

Hindi, 27 days ago

(ङ) खरगोश ने मार्ग में एक कुआँ देखा। translate in sanskrit...

Social Sciences, 8 months ago

conquered the byzantine empire ? [ write at least 3 sentances ] .

Math, 8 months ago

Age of Rahul is 5 years more than Raj.5 years ago, the ratio of their ages was 3:2.Find their present ages.(3*6=18)....................................plz write full steps........or send pic ..........................and plz do not spam...

Social Sciences, 8 months ago

Which of the following statement is fals ? * 1 point The army rulers of Myanmar are not elected by the people Dictators like Pinochet are elected by people The king of Nepal and South Arabia rule not because the people have chosen them to do so but because they happen to be born into the royal family ...