Mathematics · Progression and Series
The sum of the infinite series 12 + 22x + 32x2 + 42x3 + ..... for |x| < 1 is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11(1 - x)3
- 21 - x1 + x
- 31 + x(1 - x)2
- 41 + x(1 - x)3✓
Correct answer
1 + x(1 - x)3
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