if 3 x minus 5 y, 3 x minus 9 y, 3 x minus 13y are in AP then 90th and 91st terms are
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It is given that
3x-5y,3x-9y,3x-13y....
here ,
a =3x-5y
d = 3x-9y-(3x-5y)
d= -9y+5y=-4y
a90=a+89d=3x-5y+89×(-4y)
=3x-5y-356y
a90=3x-362y.
a91=a+90d or
a91=3x-362y+(-4y)
a91=3x-358y.
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sandhyathonukunuri:
it's wrong answer
try again this answer once more
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