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15. Ilow many terms of the G.P. 33069ate needed to give the sus512h the midunoi nf the line segment |
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Answer» a = 3 r = 1/2 Sum of n terms in a GP = a(1-r^n)/(1-r) So 3069/512 = 3(1-(1/2)^n)/(1-1/2) 3069/512*3*2 = 1- (1/2)^n 3069/3072 = 1- (1/2)^n (1/2)^n = 1- 3069/3072 (1/2)^n = 3/3072 (1/2)^n = 1/1024 (1/2)^n = (1/2)^10 Solving this equation we get the value of n = 10 Like my answer if you find it useful! thnxx😘😘😘 |
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