Question

ncert maths 10th all chapters formula

Answer 1

10th chapter only theorum

Answer 2

A sequence is called an arithmetic progression
(abbreviated A.P.) if and only if the difference of
any term from its preceding term is constant.
A sequence in which the common difference
between successors and predecessors will be
constant. i.e. a, a+d,a+2d
This constant is usually denoted by ‘d’ and is
called common difference.
NOTE : The common difference ‘d’ can be n TERM OF AN A.P. : It is denoted by t and is
given by the formula, t = a + (n —1)d
where ‘a’ is first term of the series, n is the
number of terms of the series and ‘d’ is the
common difference of the series.
NOTE : An A.P which consists only finite number
of terms is called a finite A.P. and which contains
infinite number of terms is called infinite A.P.
REMARK : Each finite A.P has a last term and
infinite A.Ps do not have a last term.
RESULT: In general, for an A.P a , a , , a , we
have d= a — a where a and a are the
(k+ 1)th and the kth terms respectively.
positive, negative or zero.