Question

pls help asaaaaaaaaaaap

Answer 1

Answer:-

T5 = 22 Option (b)

Given :-

Sn = 3n²-5n

S5 = 3(25) - 25

= 75 - 25

= 50

In A. P. ,

S5 = t1 + t2 + t3 + t4+ t5

S1 = a = 3(1)-5 = -2 = t1

S2 = a+a+d

2a+d = 3(2)²-5(2)

2(-2)+d = 12 - 10 = 2

-4+d = 2

d = 6

t5 = a+4d

= -2 + 4(6)

= -2+24

= 22