find the sum to n terms of 1+3+32+.......+3n-1?Pls help me with detailed solution
Surya , 6 Years ago
Grade 11
Algebra> find the sum to n terms of 1+3+3 2 +........
1 Answers
Arun
Last Activity: 6 Years ago
Dear Surya
If we look carefully, it is a G.P. of n terms with first term as 3^0 = 1
common ratio = 3
Now
sum = 1 * (3^n – 1)/(3 – 1)
= (3^n – 1 )/ 2
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