Question

Se considera functia   f:r-r F(x) =x+2 

a)  sa se calculeze suma F(3)+ F(3la2)+....+F(3 la 5)

Answer 1

Stim ca 3 ²=9 , 3³= 27 $3 ^{4} = 81$
 $3 ^{5} = 243$
f(3) = 3 + 2= 5
f(9) = 9 +2 =11
f(27)= 27+ 2= 29
f(81)= 81+2= 83
f(243)= 243 + 2= 245
f(3) + f(9) + f(27) + f(81) + f(243) = 5+11+29+83+245=373