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Arifmetik progressiya ta`rifi
Har bir hadi oldingisiga bir xil son ''d'' qo`shib hosil qilinadigan ketma-ketlik
umumiy hadning formulasi?
An=A1+(n-1)d
Yig`indining formulasi
Sn=n/2(A1+An)
A.P: 12 7 2... D va A15ni toping
d=-5 a15=-58
A.P: 6;10;14... Dastlabki 12ta hadning yig`indisini toping
S12=336
A1=2 d=5 a10=?
a10=47
S15=120 a1=2 d=?
d=16
a1=-4 a16=26 n=16 s16=?
s16=176
a1=25 d=-2 Qaysi had 0 ga teng
hech qaysi
a1=-15 d=4 qaysi hadi 101ga teng
n=30
