If and are in A.P., and , , then is equal to...

(d): We have given, Let be the common difference of an A.P. and be the common difference of an A.P. ...

If a_{1},a_{2},a_{3} and b_{1},b_{2},b_{3} are in A.P., and a_{1} = 2, a_{10} = 3,a_{1}b_{1} = 1 = a_{10}b_{10}, then a_{4}b_{4} is equal to: Sequence & Series (Mathematics)

a_{1},a_{2},a_{3}\ldots

and

b_{1},b_{2},b_{3}\ldots

are in A.P., and

a_{1} = 2

a_{10} = 3,a_{1}b_{1} = 1 = a_{10}b_{10}

, then

a_{4}b_{4}

is equal to