1.

In G.P 6th term is -1/32 & 9th term is 1/256 then 11th term…………

Answer»

Sixth term = T6 = -1/32

ninth term = T9 = 1/256

then , common ratio = R = ?

11th term = T11 = ?
Rp-q = Tp/Tq

R9-6 = (1/256)/-1/32

R3 = 1/256 × -32

R3 = 1/-8

R3 = -1/8

R3 = (-1/2)3

R = -1/2 .

T6 = a(R)n-1

-1/32 = aR6-1

-1/32 = aR5

-1/32 = a × (-1/2)5

-1/32 = a × -1/32

(-1/32)/(-1/32) = a

-1/32 × -32 = a

-1×-1 = a

1 = a

a = 1

T11 = aRn-1

T11 = (1)(-1/2)11-1

T11 = (-1/2)10

T11 = 1/1024



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