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Geometric Progression - 3
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Geometric progression - 3

## Bharat Gupta is teaching live on Unacademy Plus

Bharat Gupta
Engineer by degree Mathematician by Heart. Having 22 years of teaching experience. Search me on Youtube for more videos.

U
please help me to solve this 120 80 40 45 __ 5
Shiva dev
4 months ago
options?
Amol Jaiswal
4 months ago
either 40 or 25
Sir in last question why we are taking a and r same in all three series, they may be different in all three cases.
Sir, Can you please tell me how r^n-1 could be written as r^n/r?
Sir can you please teach pattern based gp like 1 + (1+3)+ (1+3+9) + (1+3+9+27) ...... +n or 2+5+14+41....+n
Bharat Gupta
a year ago
this is miss series I will teach this
Thank you sir.
1. SEQUENCE AND SERIES Class -<8 (Geometric Proqression)

2. nth term of an Geometric Progression 2 a n-l Sum of n term of an Geometric Progression

3. Sum of infinite term of an Geometric Progression =

4. The sum of 50 terms of the series 7, 7.7, 7.77, 7.777, is (a) (4490 +1m) (b) (4490 +119) (c) (44901019 Sum of the series .5 +.55+.555 + up to n terms is (b) 4490+ 1049 1049 10n 10n 2 (d) None (d) n-1(1-1 10n The product 93 99 927 ... (b) 3 (c) 81 (d) None of these If S,, S2, S be sums of a G.P. of n, 2n,3n terms respectively, then sl (S3-S2)= a. (S2- S1)2 c. S1 (S2+ S3) d. none of these

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6. The sum of 50 terms of the series is (a) (4490 +Tlio) (a) 4490 + (4490 +m) (b) (c) ( 4490 + 1049 1049 1049 (d) None

7. The sum of 50 terms of the series (a) (4490 +Tia) (b) (4490 + 10 (c) 4490 + ) (d) None ID a1 |-

8. The sum of 50 terms of the series (a) (4490 +Tia) (b) (4490 +m) (c) (d) None 4490 +

9. Sum of the series .5.55 + .555 +... up to n terms is a) in (c)ain - c1

10. Sum of the series .5.55 + .555 +... up to n terms is a) in (c)ain - c1 n- 10 Ib

11. The product 93 99 927 ... (a) 9 (b) 3 (c) 81(d) None of these 2.2 l-r

12. If S,, S2, S3 be sums of a G.P. of n, 2n,3n terms respectively, then S, (S3- S2)- a.(S2-S1)2 b.(S3-S1)? c. S1 (S2S3)d. none of these. 2.