algebra formulas all lessons std 10
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general term formula is An = a + (n - 1)d
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Chapter 1
x=DX/D
y=DY/D
Cramer's rule
Chapter 2
Square method
x sq.+bx+b/2-b/2+c=0
Formula method
-b+√b sq.-4ac/2a
Alfa+beta=-b/a
Alfa×beta=c/a
The quadratic equations whose root's are Alfa and beta is
x sq.-(Alfa+beta)x+(alfa×beta)=0
Chapter 3
tn=a+(n-1)×d
Sn=n/2(2a+(n-1)×d)
Chapter 4
GST=GST%×Taxable value
SGST=CGST=1/2×GSTROR=dividend income/sum invested×100
Sum invested=MV×no of shares
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