192
MATHEMATICS
EXERCISE 9.3
5 5 5
1. Find the 20th and nth terms of the G.P.
2'4'8'
2. Find the 12th term of a G.P. whose gth term is 192 an
3. The 5th, 8th and 11th terms of a G.P. are p, q
that q2 = ps.
4. The 4th term of a G.P. is square of its second ter
Determine its 7th term.
5. Which term of the following sequences:
(a) 2,2V2,4.... is 128 ?
(b) VE
(c)
1 1 1
1
,... is
?
3²9²27 19683
3
x,
-
2 7.
6. For what values of x, the numbers
ai
7 2
Find the sum to indicated number of terms in each a
Exercises 7 to 10:
7. 0.15,0.015, 0.0015, ... 20 terms.
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