Question

if the first three term of an ap respectively are 3 Y - 1 ,3y + 5 and 5 Y + 1 find the value of Y

Answer 1

Answer:

Step-by-step explanation:

There are namely two ways to do it:

(1) 2b=a+c

substituting: 2(3y+5) = 3y-1 +5y=1

= 6y+10=8y

= 2y=10

= 5 ANS

(2) 2nd term-1st term=3rd term-2nd term

= (3y+5) - (3y+1) = (5y+1) - (3y-5)

= 6=2y-4

=10=2y

= 5 ANS