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What will be the nth term of the AP 1, 5...

What will be the nth term of the AP 1, 5, 9, 13, 17…….?
a) 4n – 3
b) 3n – 4
c) 4n + 3
d) 3n + 4

Text Solution

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The correct Answer is:
B, C
Let the radius of the disc =R
Therefore according to the question and ure
`mg-T=ma`
and the toque about the centre
`=TxxR=1xxalpha`
`rarr TxxR=1/2(mR^2xxa)/R`
`rarr T=1/2 ma`………..2

Putting this value in the equation 1 we get
`rarr mg-1/2ma=ma`
`rarr mg=3/2ma`
`implies a=(2g)/3`
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