Math, asked by guddu983, 1 year ago

the 20th term of the arithmetic progression 10,7,4,........ is

option provided
a)-57
b)47
c)-47
d)67

when I sloved i got the answer as 67 but the answer is -47

please slove step by step

I have my board exma on Monday so please help as early as possible

Answers

Answered by amitkhokhar

a =10 and d =-3

an= a+(n-1)d

an= 10 +(20-1)(-3)

an= 10-19(3)

an= 10-57

an = -47
an= a20
which is 20th term

amitkhokhar: i think had taken common difference as +3 but its -3

snehasunil26: THE COMMON DIFFERENCE IS -3 AS THE COMMON DIFFERENCE IS CALCULATED ON THE BASIS OF 2ND NO.-1ST NO. OF THE PROGRESSION..AND THAT'S HOW BOTH OF US LANDED WITH-47 BUT IF WE HAD TAKEN D=3 WE WOULD HAVE GOT ANS. AS 67 AS WELL

Answered by snehasunil26

Answer:

-47

Step-by-step explanation:

A=10

D=7-10=-3

T20=10+19*-3

T20=10-57

T20=-47

THE ANSWER WILL COME IN NEGATIVE AS THE DIFFERENCE OF THE PROGRESSION IS NEGATIVE.

ALWAYS TAKE NOTE OF THE DIFFERENCE WHEN SOLVING AP SUMS

ALL THE BEST...

snehasunil26: HE COMMON DIFFERENCE IS -3 AS THE COMMON DIFFERENCE IS CALCULATED ON THE BASIS OF 2ND NO.-1ST NO. OF THE PROGRESSION.

snehasunil26: THE

snehasunil26: NO SWEAR WORDS AND SEXIST COMMENTS ELSE I'LL REPORT YOU TO MODERATORS AND MAY EVEN FILE A POLICE CASE

snehasunil26: YOU ARE WELCOME GUDDU DO RATE

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the 20th term of the arithmetic progression 10,7,4,........ is option provided a)-57 b)47 c)-47 d)67 when I sloved i got the answer as 67 but the answer is -47 please slove step by step I have my board exma on Monday so please help as early as possible​

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the 20th term of the arithmetic progression 10,7,4,........ is

option provided
a)-57
b)47
c)-47
d)67

when I sloved i got the answer as 67 but the answer is -47

please slove step by step

I have my board exma on Monday so please help as early as possible