Question

write and equation for the nth term of each geometric sequence
-1,-5,-25.....
and
-3,-6,-12,....

Answer 1

1) -125
2) -24

Answer 2

Now award best response

Answer 3

lolz tank @gamer456148

Answer 4

The nth term of Geometric sequence is given by
Tn = ar^(n-1)
for the sequence -1,-5,-25....
a = -1, r = 5
nth term of sequence is Tn = (-1)x5^(n-1)
= -5^(n-1)

-3,-6,-12,....
a = -3, r = 2
nth term of sequence is Tn = (-3)x2^(n-1)
= -6^(n-1)

maths question paper for class 7 ICSE - http://icse.edurite.com/icse-question-papers/icse-class-7-maths-question-papers.html