Question

three number are in A.P if second term is 4 then find the sum of three terms​

Answer 1

Answer:

The sum of three terms is 12

Step-by-step explanation:

t2=a+(n-1)d

t2=a+(2-1)d

But t2=4

Hence,. 4=a+d

Multiply throughout by 2

Hence ,

2x+2y=8. .........eq1

Sum of first 3 terms

S3=n/2[2a+(n-1)d]

S3=n/2( 8 ). (From eq 1)

S3=3/2 ( 8 )

S3= 3 × 4

S3= 12

Mark as brainliest

Answer 2

Answer:

here's your answer

Step-by-step explanation:

mark me as Brainliest