Question

plss anyone solve ques no 45

Answer 1

we know,

Sn - S(n - 1) =Tn

given,

Sq =63q - 3q^2

Tq = Sq - S(q - 1)

= 63q - 3q^2 -63(q - 1) +3(q -1)^2

=63(q - q + 1) -3(q ^ 2 - q^2 +2q -1 )

=63 - 6q + 3= 66 -6q

Tq = 66 -6q

according to question ,
Tp = -60

Tp = 66 - 6p = -60

126 = 6p

p = 21

T11 = 66 - 6(11) = 66 - 66 = 0