a1=3 r=2 oblicz a11
Szybko!!
a₁=3
r=2
a₁₁=a₁+10r
a₁₁=3+10*2=3+20=23
a₁₁=23
Odp. a₁₁=23.
a1 = 3
r = 2
an = a1 + (n - 1) * r
a11 = a1 + (11 - 1) * r
a11 = a1 + 10 * r
a11 = 3 + 10 * 2
a11 = 3 + 20
a11 = 23 --------- odpowiedź
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a₁=3
r=2
a₁₁=a₁+10r
a₁₁=3+10*2=3+20=23
a₁₁=23
Odp. a₁₁=23.
a1 = 3
r = 2
an = a1 + (n - 1) * r
a11 = a1 + (11 - 1) * r
a11 = a1 + 10 * r
a11 = 3 + 10 * 2
a11 = 3 + 20
a11 = 23 --------- odpowiedź