Question

In an A.P , if a1 = - 2, d = 5, Sn = 568, then find 'n' , 'l' .​

Answer 1

Answer:

73

Step-by-step explanation:

568=n/2(-2+5n-7). putting Lbvalue here. putting this n value in L value above .. So the L value or( last term)is =73.

Answer 2

Step-by-step explanation:

n = (n/2)[2*a + (n-1) d] ==> (n/2) *[- 4+5n-5] = 568. 5n^2 -9n ... Find the simple interest and the amount when: Principal = 2.