Question

$calculati \: {a}^{2} si \: {a}^{3 } unde \: a = \\ (1 + 0.1) + (1 + 0.2) + (1 + 0.3) + ... + (1 + 0.9)$


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Answer 1

a = (1 + 0,1) + (1 + 0,2) + .. + (1 + 0,9)

a = 1 x 9 + 1/10 + 2/10 + .. + 9/10

a = 9 + (1 + 2 + .. + 9)/10

a = 9 + 9x10:2/10

a = 9 + 45/10

a = 9 + 4,5

a = 13,5

a² = 182,25

a³ = 2460,375

Answer 2

a=(1+0,1)+(1+0,2)+(1+0,3)+...+(1+0,9)

9-1+1=9 termeni

a=(1×9)+(1/10+2/10+3/10+...+9/10)

a=9+(1+2+3+...+9/10)

a=9+(9×10:2/10)

a=9+(90:2/10)

a=9+45/10

a=9+4,5

a=13,5

a^2=13,5^2=182,25

a^3=13,5^3=2460,375